UNITED STATES DISTRICT COURT

SOUTHERN DISTRICT OF OHIO

WESTERN DIVISION

PAUL EWERS, et al., Case No. 1:18-cv-554

Plaintiffs, Bowman, M.J.

v.

LOWE’S HOME CENTERS, LLC, et al.,

Defendants.

MEMORANDUM OPINION AND ORDER

Plaintiff Paul Ewers and his wife Kim filed suit in the Court of Common Pleas for 

Warren County, Ohio against Lowe’s Home Centers (Lowe’s) after Mr. Ewers slipped and 

fell at a Lowe’s store located in South Lebanon, Ohio on or about July 31, 2016, suffering 

serious injuries. Defendant Lowe’s properly removed the action to this Court on August 

7, 2018 on the basis of diversity jurisdiction.1 The parties have completed discovery, and 

trial is scheduled to commence before the undersigned on November 12, 2019.2

 

1 Plaintiffs are residents of the State of Arizona. Defendant Lowe’s has its principal place of business in 

North Carolina, while Defendant Blue Cross Blue Shield of Michigan Mutual Insurance Company (“Blue 

Cross”) is a Michigan Corporation. Although Blue Cross has never appeared, Plaintiffs make clear in their 

complaint that they have named Blue Cross solely based upon a potential subrogation interest. Ordinarily, 

all Defendants must consent to removal but in this case, the undersigned agrees with Lowe’s that the 

interests of Blue Cross are those of an intervening Plaintiff and not a Defendant. This Order will direct the 

Clerk to so note the record. See Roman v. Barlow, Case No. 2:12-cv-747, 2012 WL 6594961 at *3 (S.D. 

Ohio Dec. 18, 2012); but see U.S. v. Real Property Known and Numbered as 1731-1735 North Fourth 

Street, Columbus, Ohio, 2006 WL 3793305 (S.D. Ohio Nov. 21, 2006) (discussing conflicting case law on 

whether a magistrate judge has the authority to rule in matter in which a putative intervening party had not 

consented to jurisdiction under 28 U.S.C. § 636(c)).

2 All appearing parties have consented to the disposition of all motions and to trial before the undersigned 

magistrate judge. See 28 U.S.C. § 636(c). However, an issue remains whether final disposition by the 

undersigned would be binding on the non-appearing intervening party, Blue Cross. See Jack Tyler 

Engineering Co. v. Colfax Corp., 2011 WL 384614 (W.D. Tenn. Feb. 3, 2011).
2

On July 18, 2019, Lowe’s filed a motion seeking to exclude Plaintiffs’ expert from 

offering testimony at trial. For the following reasons, Lowe’s motion in limine is

GRANTED. 

I. Rule 702 and the Daubert Standard for Admissible Opinion Evidence

Defendant Lowe’s seeks to exclude and strike all opinions offered by Plaintiffs’ 

liability expert, Kevin Rider Ph.D., arguing that Dr. Rider’s opinions are inadmissible under 

Rule 702 of the Federal Rules of Evidence, and under Daubert v. Merrell Dow 

Pharmaceuticals, Inc., 509 U.S. 579, 113 S. Ct. 2786 (1993). Although Defendant 

requests a formal Daubert hearing on the issues presented, a hearing would not assist 

the Court, as the parties have fully briefed all relevant issues. See Nelson v. Tenn. Gas 

Pipeline Co., 243 F.3d 244, 249 (6th Cir. 2001) (“[T]he Supreme Court’s decision in 

Kumho makes clear that whether to hold hearing is a question that falls within the trial 

court’s discretion.”).

Rule 702, Fed. R. Evid., governs the admission of the testimony of expert 

witnesses. The first part of Rule 702 defines who is “qualified” to be an expert; namely, 

any witness that the court deems to be qualified “by knowledge, skill, experience, training, 

or education....” Neither the Defendant nor this Court quibbles with Dr. Rider’s general 

ability to testify as an expert based upon his training and education. Dr. Rider holds a 

Bachelor of Science degree in Industrial Engineering, a Master of Science in Industrial

Engineering-Human Factors/Ergonomics from the University of Tennessee, and a Ph.D. 

in Industrial and Operations Engineering-Human Factors-Ergonomics and Biomechanics 

from the University of Michigan. He is Board Certified in Professional Ergonomics and a 

member of the National Counsel of Examiners for Engineering and Surveying. His 
3

curriculum vitae indicates membership in various professional societies, and a tenure as 

a professor at West Virginia University in Industrial Engineering and Safety Management. 

Dr. Rider is employed as the sole employee of his company, Forensic Human Factors, 

LLC, and testified that “the vast majority of what I do would be considered litigation 

support” as an expert witness. (Doc. 13-3 at PageID 145). In fact, Dr. Rider testified that 

“probably 95 percent of my income is generated in personal or commercial injury or 

commercial issues as an expert witness or consultant.” (Doc. 13-3 at PAGEID 145). In 

short, Dr. Rider is regularly recognized as an expert witness.

The fact that a witness may be “qualified” to testify as an expert in his field, 

however, is not the part of Rule 702 under which Defendant seeks to exclude Dr. Rider’s 

testimony. Here, Lowe’s argues that Dr. Rider’s opinions must be excluded because they 

do not meet any of the four prerequisites set forth in Rule 702 for admissibility. Under 

Rule 702, expert testimony will only be admitted if: 

(a) the expert's scientific, technical, or other specialized knowledge will 

help the trier of fact to understand the evidence or to determine a fact 

in issue;

(b) the testimony is based on sufficient facts or data;

(c) the testimony is the product of reliable principles and methods; and

(d) the expert has reliably applied the principles and methods to the facts 

of the case.

Id.

In Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579, 597, 113 S. Ct. 

2786, 2798 (1993), the Supreme Court explained that Rule 702 requires trial courts to 

perform a “gatekeeping role.” Thus, trial courts are tasked with excluding misleading “junk 

science” and ensuring that the expert testimony presented to a jury is both relevant and 
4

reliable. See Rose v. Truck Centers, Inc., 388 Fed. Appx. 528, 532-533 (6th Cir. 2010) 

(internal citations omitted); see also, generally, Kuhmo Tire Co. V. Carmichael, 526 U.S. 

137, 119 S. Ct. 1167 (1999). Although trial courts must follow the requirements of Rule 

702 as informed by controlling and persuasive case law, the decision of a trial court to 

admit or exclude an expert’s opinion under Daubert remains an exercise of judicial 

discretion. Nelson v. Tenn. Gas Pipeline Co., 243 F.3d 244 (6th Cir. 2001). 

At issue in this case is what has been described as the “often-elusive line between 

admissible opinion and inadmissible speculation.” Tamraz v. Lincoln Elec. Co., 620 F.3d 

665 (6th Cir. 2010). “It is the proponent of the testimony that must establish its 

admissibility by a preponderance of proof.” Nelson, 243 F.3d at 251 (citing Daubert, 509 

U.S. at 592 n.10). Examining Dr. Rider’s proffered opinions in the context of all relevant 

factors, the undersigned agrees with Lowe’s that Dr. Rider’s opinions should be excluded

in their entirety because his testimony will not help the jury to understand the evidence or 

the critical facts in issue, and is not sufficiently reliable. 

A. Dr. Rider’s Testimony Would Not Assist the Trier of Fact

The undisputed facts confirm that this slip and fall case is a straightforward one. 

On a bright, sunshiny day in July 2016, Plaintiff Paul Ewers drove to a Lowe’s home 

improvement store in South Lebanon, Ohio in order to exchange an empty propane tank 

for a full one. After paying for his purchase, Plaintiff followed a store employee back 

outside Lowe’s to a row of locked cages where the new tanks were stored. Adjacent to

the same area, close to the parking lot, was a display row of lawn mower equipment. 

Lowe’s had secured the equipment with a cable attached to a cement post in front of the 

store. After receiving his new propane tank, Plaintiff turned to walk in between two 
5

secured pieces of equipment toward his parked car and tripped on the cable, sustaining 

injury. 

Based on that uncontested basic fact pattern, the undersigned concludes that 

expert testimony is not necessary or helpful. “Jurors do not leave their knowledge of the 

world behind when they enter a courtroom and they do not need to have the obvious 

spelled out in painstaking detail.” Dawson v. Delaware, 503 U.S. 159, 171, 112 S. Ct. 

1093 (1992). 

Dr. Rider intends to offer the following purportedly “scientific” opinions at trial:

1. The presence of the cable was a violation of pedestrian expectations 

and contributed to Mr. Ewer’s [sic] fall.

2. Mr. Ewers[’s] failure to detect the presence of the cable is consistent 

with established visual scanning behaviors while walking and was not a 

cause of his fall.

3. The lack of contrast between the incident cable and concrete inhibited 

Mr. Ewers’s ability to detect the cable.

4. Mr. Ewer’s focused attention on the oncoming vehicle task predictably 

inhibited his ability to detect the inconspicuous cable on the ground.

5. Lowe’s failure to prevent a tripping hazard from existing in a pedestrian 

path created a dangerous condition that contributed to Mr. Ewers’s fall.

6. The unexpected presence of the cable, the proximity of the cable to the 

open cage door and lawn mowers, the lack of contrast between the 

cable and concrete, and insufficient time for Mr. Ewers to detect the 

presence of the cable, and the approaching vehicle as Mr. Ewers turned 

to walk to the parking lot all contributed to Mr. Ewers’s fall.

(Doc. 14-3 at 42, PageID 369). 

Close examination of Dr. Rider’s testimony reveals relatively little “scientific 

method” or other indicia of reliability to support his opinions. However, separate from the 

issue of reliability is the more obvious question concerning the degree to which his 
6

testimony would actually benefit the jury in its understanding of the evidence or to 

determine a fact in issue. Rather than providing assistance in a case in which the factual 

issues are complex, such as in a car crash case involving skid marks requiring 

mathematical calculations and reconstruction techniques, or a case in which a jury is 

called to determine whether exposure to a chemical caused a particular disease, Dr. Rider 

offers to enlighten the jury on such mundane principles as “pedestrian expectations” and 

“visual scanning behaviors while walking.” Such testimony is - at best - superfluous and 

wholly unnecessary. The jurors are expected to possess sufficient practical knowledge 

of the world around them to understand the basic functions of walking and visual attention 

or inattention while walking, and do not require expert testimony to evaluate the credibility 

of Plaintiff’s testimony and/or to apply the law to the facts presented to them.3

Many of the opinions offered by Dr. Rider are framed as legal conclusions based 

upon Plaintiff’s testimony that he did not observe the cable before tripping on it. Dr. Rider 

explained that he based such opinions upon his own interpretation of Ohio’s law 

concerning an “open and obvious” danger. “An open and obvious hazard doesn’t matter 

if you saw it yesterday, necessarily, if it’s hidden, unrelated to what you’re doing....” (Id., 

Depo. at 46, PageID 155, emphasis added). But Dr. Rider’s understanding of “open and 

obvious” based upon the subjective experience of the Plaintiff4 does not fully comport with 

Ohio law and carries with it a significant risk of jury confusion. Dr. Rider testified that 

other opinions were informed by his understanding of Ohio’s law on “attendant 

 

3 See, e.g., PageID 154, Depo. at 45, testimony that equipment “certainly would have been in [Plaintiff’s] 

visual field,” even though “he didn’t see any cabling or the power equipment despite it being there. That is 

not a failure on his part whether it was unrelated to what he was doing” because “his attention wasn’t on it. 

This is classic visual scanning and attention.” 

4

 See Depo. at 43, PageID 154: “[M]y analysis is based on his expectations that he’s testified,” including 

testimony that Plaintiff had experienced “43 years of not seeing cabling securing out power equipment.” 
7

circumstances,” a concept explained to him by Plaintiff’s counsel.5(Id. at 51, PageID 156). 

Dr. Rider’s legal conclusions are clearly inappropriate. See DeMerrell v. City of 

Cheboygan, 206 Fed. Appx. 418, 426-427 (6th Cir. 2006); Berry v. City of Detroit, 25 F.3d 

1342, 1353 (6th Cir. 1994); Alvarado v. Oakland County, 809 F. Supp.2d 680, 687-688 

(E.D. Mich. 2011) (discussing cases and holding that expert opinions must stop short of 

framing the ultimate legal conclusion which the jury must reach). 

Multiple courts have concluded that, at least in the context of straightforward slip 

and fall cases such as this one, expert testimony is not necessary or helpful under 

Daubert principles of “helpfulness,” relevance, or “fit.” See generally Buckner v. Sam’s 

Club, 75 F.3d 290 (7th Cir. 1996) (expert affidavit merely constituted “simple common 

sense” and “provided no scientific or technical knowledge that would assist the trier of 

fact.”). In fact, similar testimony by Dr. Rider has been excluded by other courts. For 

example, in a case involving a slip and fall while walking over a raised threshold on a 

cruise ship that had been covered with a mat, a Florida district judge wrote extensively 

about the lack of helpfulness of Dr. Rider’s opinions, which were similar to those 

presented in this case:

The only clouds darkening the clear waters of this case are the attempts to 

introduce expert testimony.... This testimony unnecessarily complicates the 

case.

Walking. That is the action at the heart of this case. Walking is something 

almost all individuals understand. Rider derives numerous conclusions from 

his analysis of the carpet, all to say that Plaintiff tripped because of a 

condition on the ground.... His report states, “[W]hen walkways are 

improperly designed and maintained, pedestrians may be exposed to 

 

5 Dr. Rider also refers to Plaintiff’s subjective experience as “attendant circumstances,” which does not 

necessarily fully agree with Ohio law. “I forget [counsel’s] exact definition, but, basically, there are specific 

issues at this moment or near it that basically caused the fall, like the car coming by, like the four things I’ve 

laid out here.” (Id., Depo. at 51-52, PageID 156; see also id. at 47 (citing to Plaintiff’s subjective experience 

of failing to observe or expect merchandise to secured by a cable in front of a home improvement store). 
8

dangerous conditions.” Id. at 6. This is not the kind of assertion which 

requires expert testimony; it is neither a stretch nor even a hop of logic to 

say that humans may trip if they encounter an obstacle in their path. Jurors 

can easily understand the simple mechanics of walking and the various 

reasons one may fall, including tripping on a carpet.

People other than Plaintiff's proposed expert also frequently encounter 

changes in lighting. Rider writes in his report, “[W]hen people encounter 

significant differences in the amount of light from one area to another, the 

eyes require time to fully adjust to the change in illumination.” ... He 

concludes that “the change in brightness between the interior and exterior

of the doorway inhibited Ms. Torres' ability to detect and identify the trip 

hazard.” Id. at 11. ...An expert is neither necessary nor helpful for this fact. 

Changes in brightness are encountered everyday by all individuals 

fortunate enough to have eyesight. This understanding of the human eye's 

basic reactions to changes in light is innate to having eyesight. The Court 

is skeptical why an expert would ever testify to such evidence.

Rider also opines on the efficacy of Defendant's warnings.... He states, 

“The caution cones used near the incident doorway do not effectively alert 

a pedestrian to the unexpected trip hazard of the carpet.” Id. at 13. There is 

no specialized knowledge needed to look at cones and asses their ability to 

warn. An average lay person can listen to lay testimony about placement, 

color, size, etc. of cones and decide whether a warning was appropriate or 

not. Rider is not assisting the jury understand matters which they would not 

otherwise comprehend.

Rider has no greater and no less experience than the general public in the 

matters relevant to this case. ... A jury can determine quite well for itself how 

the Defendant acted in this case and what relationship, if any, those actions 

have to Plaintiff's injuries. All of the issues to which Rider would testify are 

well within the understanding of the average lay person. To permit expert 

testimony on issues where the jury can easily form an opinion would be to 

invade the province of the jury. The Court believes the jury is a capable and 

competent, and should be respected as such. Expert testimony is not 

helpful on issues this astute body can understand.

At best, Rider's testimony would be superfluous. At worst, the testimony 

would confuse the jurors. Expert testimony inherently has a “powerful and 

potentially misleading effect.” ... “Simply put, expert testimony may be 

assigned talismanic significance in the eyes of lay jurors, and, therefore, the 

district courts must take care to weigh the value of such evidence against 

its potential to mislead or confuse.” Id. Rider's testimony would needlessly 

complicate a simple case. The substantial risk of confusing the jury and 

wasting time meets the criteria set forth in Federal Rule of Evidence 403 for 

excluding the evidence.
9

The testimony is best excluded at this juncture and not left to a “weight of 

the evidence” argument at trial.... This is a run-around on the Court's 

gatekeeping function. The district courts are required to determine 

competency, helpfulness, and reliability of the proposed expert. Facts 

calling into question any of the three prongs are not arguments over 

persuasiveness but are disputes the Court is required to address in the first 

instance. It would make the exception swallow the rule if, in cases like this, 

the “weight of the evidence” argument won out over the clear law requiring 

the Court to be a gatekeeper and the jury's fundamental role to the 

American legal process.

Torres v. Carnival Corp., 2014 WL 3548456, at *2-3 (S.D. Fla 2014). The Torres court 

further explained that Dr. Rider’s opinions failed the “reliability” test under Daubert, and 

subsequently granted summary judgment to the Defendant cruise shop. 

On appeal, the Eleventh Circuit affirmed the trial court’s exercise of discretion to 

exclude Dr. Rider’s opinions, as well as the grant of summary judgment. With respect to 

the issue of “helpfulness,” the Court of Appeals wrote:

The judge ...reasonably determined Rider's testimony would not be helpful 

to the jury. Rider's testimony regarding walking and the efficacy of different 

types of warnings can be understood easily and evaluated by 

jurors. See Evans v. Mathis Funeral Home, Inc., 996 F.2d 266, 268 (11th 

Cir.1993) (affirming exclusion of expert testimony regarding the causes of 

plaintiff-appellant's fall, because they were “within the common knowledge 

of the jurors, and thus the probative value of such testimony was 

outweighed by the danger of prejudice” (citing Federal Rule of Evidence 

403)).

Torres v. Carnival Corp., 635 Fed. Appx. 595, 600 (11th Cir. Nov. 20, 2015). So too here, 

notwithstanding the use of “scientific” phrases such as “pedestrian expectations” and 

“visual scanning,” walking with one’s eyes open is an activity that falls within the purview 

of a juror’s common experience.

Plaintiff argues that Torres is distinguishable because there, the trial court found 

that Dr. Rider’s opinion that a change in brightness contributed to the plaintiff’s fall was in 
10

contrast to the plaintiff’s testimony. It is true that the trial court pointed out that

discrepancy, as did the appellate court. However, as is evident from the lengthy 

quotations set forth above, the factual discrepancy played a minor role in the court’s 

decision. In other words, the fact that Dr. Rider’s opinions agree with the Plaintiff’s 

testimony in this case does not make them more relevant or reliable.

In Pickens v. Wal-Mart Stores East, LP, 2015 WL 4997064 (N.D. Ind. Aug. 20, 

2015), Dr. Rider’s opinions also were excluded. There, the plaintiff was walking toward 

the main aisle of a large retail store when his foot hit the corner of a display skid containing 

boxes of above-ground pools, causing him to trip and fall. Dr. Rider’s opinions in Pickens

closely resemble those offered here. Based on his expert qualifications and training as 

well as his review of the plaintiff’s testimony, the discovery in that case, and various safety 

manuals and treatises about human factors, Dr. Rider offered the following:

(1) Mr. Pickens had a reasonable expectation of a safe and 

unobstructed walking surface.

(2) Walmart's failure to provide a safe walking path for guests, such as Mr. 

Pickens, violated his reasonable expectation.

(3) Had [Wal–Mart] complied with national standards and design guidelines 

for walkway design and maintenance by eliminating the trip hazard, Mr. 

Pickens would not have fallen.

(4) Mr. Pickens's actions were reasonable and foreseeable, and were not 

a cause of his fall.

Id., at *2. 

As in Torres, the Pickens Court excluded Dr. Rider’s opinions because they 

would not be helpful to assist the jury:

The Court concludes Dr. Rider's opinions will not assist the jury. Fed.R.Evid. 

702 requires that expert testimony “help the trier of fact to understand the 

evidence or to determine a fact in issue.” Expert testimony is unnecessary 
11

if “the subject matter of the testimony is clearly within the average person's 

grasp.” Sommerfield v. City of Chicago, 254 F.R.D. 317, 329 (N.D.Ill. 2008) 

(citing Gil v. Reed, 381 F.3d 649, 659 (7th Cir. 2004)). “Jurors do not leave 

their knowledge of the world behind when they enter a courtroom and they 

do not need to have the obvious spelled out in painstaking detail.” Dawson 

v. Delaware, 503 U.S. 159, 171, 112 S.Ct. 1093, 117 L.Ed.2d 309 (1992).

The jurors on Plaintiffs' jury would be familiar with - if not well versed in - the 

realities and circumstances of shopping at a large retail store. Many, 

perhaps all, will have shopped at a Wal–Mart store or similar large stores. 

They will have encountered displays and will likely have had first-hand 

experience with retail sales techniques. As such, the jurors will be fully 

equipped to listen to testimony and review visual evidence to reach their 

own opinions about Mr. Pickens's expectations and the ultimate cause of 

his fall.

Moreover, the facts in this case are not complicated. Being exposed to 

display skids at a large retail store is a common experience that does not 

require specialized knowledge to analyze. In fact, Dr. Rider's testimony, 

which amounts largely to legally determinative conclusions, could actually 

confuse the jury unnecessarily. Therefore, the Court must exclude Dr. 

Rider's expert testimony because it does not meet the requirements set 

forth in Fed.R.Evid. 702.

Id., at **2-3. 

Torres and Pickens are persuasive in the case presented concerning the 

“helpfulness” of Dr. Rider’s proffered testimony. See also, generally, Kough v. Wing 

Enterprises, Inc., 2015 WL 164609 (E.D. Tenn. Jan. 8, 2015) (excluding human factors 

expert’s proffered testimony regarding consumer expectations, because it was not the 

type of testimony that would assist the jury and was prepared solely for litigation); K-Mart 

Corp. v. Honeycutt, 24 S.W.3d 357, 43 Tex.Sup. Ct. J. 1002 (Tex. 2000) (affirming trial 

court’s exclusion of human factors and safety expert where jury could view photographs 

and draw its own conclusions, expert’s opinions concerned ultimate issues of store’s 

negligence, and other opinions were within average juror’s common knowledge); 

Anderson v. Home Depot, 2017 WL 2189508 at *5 (D. Md. May 16, 2017)(excluding 
12

opinion as unhelpful because it simply drew “common-sense conclusions that jurors were 

equally qualified to make, and there was no fact in issue begging for an expert’s 

explanation, collecting cases); Alzubaidi v. Wal-mart Stores, Inc., 1991 WL 99423 (E.D. 

La. 1991) (excluding safety expert’s testimony that slip and fall occurred as a result of 

lack of proper procedures by store to maintain safe walking conditions for their customers, 

because case presented was “a typical slip and fall case about which the ordinary jury is 

competent to decide...without need of an expert.”) 

It is worth noting that Dr. Rider’s testimony also has been excluded in at least one 

case that is factually distinguishable from the garden variety “slip and fall” fact pattern

illustrated here. Despite factual distinctions, the reasoning employed rings true. See e.g. 

DeJesus v. Knight Indus. & Assoc., Inc., 2016 WL 1555793 (E.D. Pa. April 18, 2016) 

(affirming exclusion of Rider on reconsideration after remand from the Third Circuit on 

other grounds, because Rider’s testimony was based on facts not in the record, because 

he relied on an academic source without attempting to replicate the environment at the 

time of the accident, and because his opinion was based on speculation and unreliable 

methods, concurring with prior judicial determination at 2013 WL 3833247 at *4 (E.D. Pa 

July 25, 2013) (excluding Dr. Rider’s opinion that lift table was defectively designed and 

manufactured because opinions were not based on scientific method or procedure, and 

“Dr. Rider’s assertion and citation to an academic source do not constitute a reliable 

methodology”); but see Mascari v. Bordentown Regional H.S., 2018 WL 548561 (N.J. 

Dec. 19, 2017) (reversing and remanding exclusion of Dr. Rider for a hearing under state 

law, because New Jersey Rule 702 is more liberal than the Daubert standard, while 

clarifying that during a full hearing, the parties could explore “all legally recognized 
13

grounds for precluding Dr. Rider’s opinion as inadmissible.”) and contrast Estate of Arama 

v. Winfield, 2017 WL 1951462 at *8 (N.D. In. May 11, 2017) (declining to exclude Rider 

opinions in motorcycle crash case, because “while the mathematical calculations Rider 

performed may not be overly complex, the conclusions rendered thereon are not within 

the knowledge of men of ordinary experience and they will assist the jury in making a 

decision on the issue of liability.”).

In a memorandum in opposition to Defendant’s motion to exclude Dr. Rider, 

Plaintiffs argue:

Dr. Rider’s testimony supports and scientifically deciphers why the Plaintiff

[Paul Ewers] (1) did not see the cables as he approached the front of the 

store, because as a reasonable person in this situation he was focused on 

the door and because he did not traverse the cables; (2) that when he went 

from the door to the propane cages, he did not see the cable because he 

was focused on following the cashier; and (3) when he left the cashier he 

did not see the cables because his attention was focused on maneuvering 

past the open cage door which was in his way with the new thank [sic] in 

hand, which concealed the cable from his view. 

(Doc. 17 at 8). For the reasons discussed, Plaintiffs’ argument in favor of the “helpfulness” 

of this testimony is wholly unpersuasive. The jury does not require expert testimony on 

any of these issues.

Plaintiffs’ memorandum in opposition also cites two cases to support their 

assertion that other courts have admitted human factors’ expert opinions to assist the jury 

in cases in which the central issue is whether a danger is “open and obvious.” Leaving 

aside that the “open and obvious” determination is generally a legal issue for the court 

rather than a factual determination for a jury under Ohio law,6 neither of the cited cases 

 

6 Plaintiffs concede that in general, whether a danger is open and obvious is a question of law in Ohio. 

However, Plaintiffs cite to the unpublished Ohio Court of Appeals decision in Ray v. Wal-Mart Stores, 2009 

WL 2783231 (Ohio Ct. App. Aug. 25, 2009) to argue that, on the facts presented here, whether the cable 

securing the lawnmowers was “open and obvious” should be presented to the jury. Ray did not concern 
14

is persuasive. The first case on which Plaintiff relies, Scott v. Sears, Roebuck & Co., 789 

F.2d 1052 (4th Cir. 1986), is both outside the Sixth Circuit and was decided pre-Daubert. 

Moreover, the case simply does not support the admission of Dr. Rider’s testimony. In

Scott, the appellate court reversed and remanded after finding prejudicial error based on 

the admission of human factors expert testimony, despite concluding that the admission 

of one of the expert’s opinions reflected only “harmless error,” and that the admission of 

another opinion fell within the court’s discretion. 

The second case on which Plaintiffs rely, Daves v. Morgan Tire & Auto, Inc., 2009 

WL 5126579 (W.D. Ky. Dec. 18, 2009), also fails to persuade this Court that Dr. Rider’s 

opinions would be helpful.7In Daves, the trial court allowed a safety engineering and 

human factors expert to testify about the lack of adequate inspection of a tire store’s public 

restroom. The same expert was permitted to testify that spill hazards are difficult to see, 

especially when they do not differ significantly from the surrounding floor surface in 

texture, color or luminance. It does not appear that the tire store appealed the evidentiary 

ruling. Despite the undersigned’s belief that such testimony could have been excluded, 

the nature of a discretionary Daubert ruling means that different courts may reach 

different conclusions. For the reasons discussed above, including but not limited to the 

greater weight of case law cited infra, the undersigned remains firmly convinced that Dr. 

Rider’s testimony must be excluded here.

 

the admission of expert testimony, and does not undermine the conclusion that Dr. Rider’s testimony is 

neither helpful to the jury nor reliable on the record presented. See also Goodson v. Millennium v. Copthorne 

Hotels, PLC, 2015 WL 74271 (S.D. Ohio Jan. 6, 2015) (granting summary judgment, holding that plaintiffs 

“cannot transform an otherwise open-and-obvious condition into a dangerous hazard through the opinion 

of an expert.”) (citing Armstrong v. Best Buy Co., 99 Ohio St.3d 79, 83, 788 N.E.2d 1088 (2003)).

7 Plaintiffs’ memorandum mistakenly cites to an unrelated ruling from Daves issued on July 19, 2010. See 

id., 2010 WL 2858667.
15

B. Dr. Rider’s Opinions Are Not Reliable

“A district court is not required to admit expert testimony “that is connected to 

existing data only by the ipse dixit of the expert. A court may conclude that there is simply 

too great an analytical gap between the data and the opinion proffered.” Nelson, 243 

F.3d at 254 (quoting General Elec Co. v. Joiner, 522 U.S. 136, 146 (1997)). Both the 

Supreme Court in Daubert and Kuhmo Tire and subsequent Sixth Circuit case law 

emphasize that the reliability inquiry is a flexible one. See Nelson, 243 F.3d at 251. Here, 

Dr. Rider’s opinions suffer from multiple “reliability” weaknesses, including: (1) the lack 

of evidence that Dr. Rider’s “methodology” in this case is common in the professional or 

scientific community; (2) overreliance on Plaintiff’s subjective testimony as a basis for 

allegedly “objective” findings; (3) the lack of any testing or replication of circumstances; 

i.e., an absence of investigation or precise studies of the subject store, vehicular or foot 

traffic, or measurements of the cable or of any other objects; (4) the fact that the opinions 

were obtained for this litigation by an expert who, in slip and fall cases, testifies 

overwhelmingly in favor of plaintiffs;

8

(5) the fact that the opinions appear to be resultoriented legal conclusions rather than scientific findings of fact. See, e.g., Pickens, 2015 

WL 4997064 at *3 (excluding as unreliable similar opinions by Dr. Rider that provided 

ultimate conclusions without analysis, where substantial analytical gaps existed between 

the data Dr. Rider allegedly relied upon and the opinions themselves); DeJesus, 2016 

 

8 Dr. Rider testified that he primarily provides testimony in automobile/trucking cases, with approximately 

30% of his work spent on premises liability (i.e., slip and fall) cases. He further testified that more than 70% 

of his work in such cases is performed on behalf of plaintiffs, but that his automobile cases reflect a more 

even split. (Id. at 147 (Tr. 14). Dr. Rider’s Rule 26(f) report lists 61 cases over the past four years, with 

82% of those cases on behalf of plaintiffs. The Sixth Circuit has approved consideration, in the context of a 

Daubert “reliability” determination, of whether an expert’s opinions have been formed for the express 

purpose of litigation. Nelson, at 252 (“”[C]lose judicial analysis of expert testimony is necessary ‘because 

expert witnesses are not necessarily always unbiased scientists,’” quoting Turpin v. Merrell Dow Pharm., 

Inc., 959 F.2d 1349, 1352 (6th Cir. 1992)). 
16

WL 1555793 at *6 (affirming exclusion of Dr. Rider’s opinions based upon speculation 

and the unreliability of his methods); id., 2013 WL 3833247 at **4-5 (same); Torres, 2014 

WL 3548456 at *4 (describing Dr. Rider’s methodology in slip and fall case as 

“questionable” because he never investigated the subject vessel and felt it was 

unnecessary to do so, noting entire analysis in absence of first-hand investigation made 

the “relationship between Rider’s findings and Plaintiff’s fall a long-distance one.”); Torres, 

635 Fed. Appx. at 600 (affirming exclusion of Rider’s conclusions as misleading, 

speculative, and unreliable); Anderson v. Home Depot, 2017 WL 2189508 at *5 

(excluding opinion that retail store did not properly install a “stable” display as not based 

on sufficiently reliable reasoning or methodology where opinion was based on expert’s 

training as a “certified safety expert” who relied on the “National Safety Council Accident 

Prevention Manual” because the manual did not establish any principles or methods 

against which an expert can assess the particular retail display).

Plaintiffs argue that the Sixth Circuit has held that any weakness in the underlying 

factual basis for an expert’s opinions bears on the weight as opposed to the admissibility 

of the evidence. That point is valid only as a general principle; Plaintiffs cannot invoke it

as a mantra to completely escape the gatekeeping function established by Rule 702 and 

Daubert. Notably, the Sixth Circuit case cited by Plaintiffs involved much different facts, 

including intricate calculations and uses of data sets. See In re Scrap Metal Antitrust 

Litig., 527 F.3d 517, 527-530 (6th Cir. 2008) (affirming discretionary decision that 

permitted economist to testify about his complex calculation of damages in Sherman Act 

class action, despite challenges to his data sets and assumptions as “garbage in, garbage 
17

out,” because the expert “provided reasoned explanations for the assumptions that he 

made and ...viable arguments to support his data set choices.”). 

II. Conclusion and Order

For the reasons discussed above, IT IS ORDERED:

1. The Clerk shall amend the docket to reflect that Blue Cross Blue Shield is 

named as an intervening Plaintiff rather than a Defendant;

2. Defendant Lowe’s motion to exclude the testimony and to strike the opinions of 

Dr. Rider (Doc. 14) is GRANTED. Dr. Rider’s opinions will be excluded from 

further consideration by this Court or by a jury, should this case proceed to trial;

3. For reasons of judicial economy, the Court will stay ruling on the pending 

motion for summary judgment until after the conclusion of the scheduled 

mediation before Magistrate Judge Karen Litkovitz. A prompt ruling will follow 

the conclusion of the mediation.

 s/ Stephanie K. Bowman 

Stephanie K. Bowman 

United States Magistrate Judge