1

Filed 11/24/15 Wolf v. BMW of North America CA1/2

NOT TO BE PUBLISHED IN OFFICIAL REPORTS

California Rules of Court, rule 8.1115(a), prohibits courts and parties from citing or relying on opinions not certified for 

publication or ordered published, except as specified by rule 8.1115(b). This opinion has not been certified for publication

or ordered published for purposes of rule 8.1115. 

IN THE COURT OF APPEAL OF THE STATE OF CALIFORNIA

FIRST APPELLATE DISTRICT

DIVISION TWO

HENRY WOLF,

Plaintiff and Appellant,

v.

BMW NORTH AMERICA, LLC et al.,

Defendants and Respondents.

 A141814

 (San Francisco City and County 

 Super. Ct. No. CGC-12-520316)

Henry Wolf filed a complaint for personal injury and product liability against 

BMW North America, LLC (BMW) and Corbin-Pacific, Inc. (Corbin-Pacific). He 

alleged that he suffered an injury while riding his BMW motorcycle due to the vibrations

from his motorcycle’s Corbin-Pacific seat. The trial court granted nonsuit against Wolf’s 

claims, and Wolf appeals. We conclude that Wolf failed to make a prima facie showing

of causation and affirm the judgment. 

BACKGROUND

On April 26, 2012, Wolf filed a form complaint against BMW and Corbin-Pacific

for negligence, negligent infliction of emotional distress, and product liability1 after he 

suffered “a severe case of priapism (a persistent lasting erection)” after riding for two 

 

1 Wolf’s product liability cause of action was based on strict liability, negligent 

failure to warn, and breach of warranty. The trial court granted motions for summary 

adjudication in favor of BMW and Corbin-Pacific as to the strict liability claim based on 

breach of warranty and denied these motions as to Wolf’s other claims. 
2

hours on his 1993 BMW motorcycle equipped with a Corbin-Pacific seat. He alleged 

that he was no longer able to engage in sexual activity. He asserted that his condition 

“was caused by the ridge-like seat on his motorcycle, negligently designed, manufactured 

and/or installed” by BMW and Corbin-Pacific. 

Prior to trial, BMW and Corbin-Pacific filed several motions in limine seeking to 

exclude testimony of Samuel C. McIntosh and Dr. Jonathan S. Rutchik. The trial court 

denied their request and stated that it “will take up the foundation for their opinion as 

they testify . . . .” The court admonished: “The plaintiff has a difficult case, because if 

the plaintiff is correct about how this happened, that the motorcycle vibration in 

combination with the seat caused the damage to the nervous system that results in 

permanent erectile dysfunction, it is not established in the medical literature. This hasn’t 

happened before that is documented.” 

Trial began on March 7, 2014. Wolf testified that he bought the 1993 BMW on 

September 5, 2009, from Edward Austin. The 1993 BMW was equipped with a custom

seat manufactured by Corbin-Pacific. When he bought the BMW, Austin gave him the 

original BMW stock seat but Wolf never removed the Corbin-Pacific seat. 

Wolf testified that he rode the BMW motorcycle at least twice a month between 

September 2009 and May 2010. His rides generally lasted “an hour or so.” Until his 

two-hour ride that caused his injury, he had not experienced any “erection problems” 

after riding the motorcycle. He testified that he had owned about 20 or 25 different 

motorcycles and had been riding motorcycles for about 35 years. He described the 

overall vibration of this motorcycle in comparison to the others that he had ridden as 

being “a very buzzy bike. It makes a lot of high-frequency vibrations.” 

Austin testified that he had frequently commuted from his home to work on the 

motorcycle he sold to Wolf, and his work was about 38 miles from his home. Most of his 

commute was on a winding mountain road, and part of it was on a freeway. He never 

experienced unpleasant vibrations or a priapism from riding the motorcycle. 
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On Saturday, May 1, 2010, Wolf rode the motorcycle to and from work. Traffic 

was heavy and it took him over two hours to get to work. He spent about one hour at a 

meeting, and then his ride home lasted about two and one-half hours. 

Once he returned home, Wolf had a few drinks with a friend. He testified that he 

did not have sex that night. The following morning, Wolf woke up around 9:30 or 10:00 

a.m. with an erection. He did not have any penis pain. Two days after his ride, on May 

3, 2010, Wolf still had some soreness in his perineum and he went to the emergency 

room at Marin General Hospital (Marin General). Marin General’s initial assessment 

records stated: “Erection x 24 hours, has occurred in the past but this is the longest[.]” It 

further provided: “Long motorcycle ride on Saturday (also vigorous sex on Saturday)[.]” 

Dr. Jeffrey D. Weitzman saw Wolf. He evaluated Wolf and consulted with an

urologist. Dr. Weitzman “aspirated both sides of the corpora cavernosa and irrigated the 

penis and then attempted oral Ativan and tetracycline.” This treatment did not “cause[]

the priapism to resolve.” The diagnosis was “[p]riapism etiology uncertain.” 

Dr. Weitzman’s notes indicated that Wolf “presents with a persistent erection . . . . 

The patient states he has been experiencing this intermittently when awakening for the 

past year, but it usually resolves spontaneously within 5 hours. This time it has persisted 

longer than ever before.” He wrote that, Wolf “notes some soreness in the perineum, 

which he attributes to a long motorcycle ride on Saturday.” 

A report signed by Dr. Harry Neuwirth provided the following regarding the 

history of Wolf’s illness: “The patient has a long history of intermittent episodes of 

priapism. He has never required any treatment, however. He often has prolonged

erections however. Two days ago, he had a prolonged motorcycle ride. Yesterday 

morning, he awoke with an erection and this has not gone down in the last 30 hours.” 

Wolf was transferred to the University of California, San Francisco Medical 

Center (UCSF). The report on Wolf’s “admission history and physical” stated in 

pertinent part: “Patient reports he was riding his motorcycle on [May 1, 2010,] over a 

bumpy road. He noted pain in his perineum. When he woke up on [May 2, 2010,] he 

had a rigid erection that persisted throughout the day, but decreased in tumescence from 
4

100% to only partial erection. He reports that when he awoke on [May 3, 2010,] the 

erection was again ‘rock hard.’ . . . Dr. Neuwirth . . . aspirated approximately 200 ml of 

blood from the penis. This resulted in detumescence with tumescence noted again soon 

afterward. The patient received tributalene 10 mg x 2 with no detumescence. . . . He 

reports prior history of priapism that resolved on its own after 7-8 hours, also associated

with perineal pain.” 

Dr. Tom Lue, a urologist, and resident Dr. Alan Shindel performed an ultrasound, 

which revealed “no to sparse flow in penis consistent with ischemic priapism.” Dr.

Shindel wrote in the record the following: “The patient gives a history of having 

prolonged penile erections several times before in his lifetime, the first of these was 

painful but subsequent recurrences have not been. . . . The patient was seen and 

evaluated by Dr. Tom Lue with physical examination and color duplex ultrasound. This 

was demonstrative of little to no flow in the corporal bodies bilaterally. Based on this 

finding, we suspect venous thrombosis which may be either causing ischemic damage or 

may easily progress to causing ischemic damage in the near future. We have 

recommended T shunt formation to alleviate this possibility. [¶] After discussing the 

nature of the procedure as well as risks (pain, bleeding, infection, persistence of shuntpost-treatment) and benefits (relief of obstruction to blood flow), the patient had

substantial trepidation about proceeding. . . . [H]e does not wish [to] have a shunt 

procedure at this time. He understands that failure to act at this point may pose a risk of 

erectile dysfunction in the future and he accepts this risk.” 

Dr. Lue testified that there are three types of priapism and approximately 90 

percent were diagnosed as ischemic, or “low-flow” priapism, in which there is no 

circulation to the penis. A low flow priapism is an emergency because the tissue can die 

and then “the patient will have no erection the rest of his life.” A low flow priapism is 

usually very painful while a high-flow priapism, which is usually secondary to trauma, is 

not painful. He stated that he could not state with any reasonable medical certainty that

Wolf’s motorcycle ride had anything to do with his priapism, and noted, “[S]ome other 

people may have a different opinion.” 
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The following day, May 4, Wolf had a second Doppler ultrasound. The results 

showed some blood flow through the right-side artery, but no flow through the left distal 

corporal body of his penis. Dr. Lue testified that this ultrasound did not change his 

diagnosis because it is common to have a period of poor or no circulation and then to 

have increased blood flow. This condition is called postischemic hyperemia. 

On May 10, Wolf saw Dr. Jack W. McAninch at UCSF. Dr. McAninch noted 

that the sonography demonstrated penile blood flow consistent with high flow priapism. 

At trial, he testified that he believed Wolf suffered from high flow priapism. He had not 

seen the results of the ultrasound completed on May 3, 2010, which found ischemic 

priapism, but did see the ultrasound completed on May 4. In his opinion, Wolf’s 

condition was caused by perineal trauma experienced during the motorcycle ride. He 

noted that Wolf had not complained about pain, a strong indicator of ischemic type 

priapism and a lack of pain was consistent with high-flow priapism. He believed that the 

motorcycle ride altered the regulatory mechanism of the blood flow, including the 

controlling nerves, and that there could be “nerve injury from sitting astraddle of an 

object, and that can alter the vascular pattern or blood pattern and flow to the penis.” 

Dr. McAninch acknowledged that he was unaware of any case where a ride on a 

motorcycle was the suspected cause of priapism. He had no opinion about the design of 

the Corbin-Pacific seat. He could not state with any reasonable degree of medical 

certainty that Wolf would not have had a priapism if he had not taken the motorcycle ride 

on May 1. 

On May 11, Wolf contacted UCSF and reported a change in his erections; he was 

advised to return for further evaluation. Dr. Lue treated him. Dr. Shindel wrote in the 

medical record that a t-shunt procedure was recommended for restoration of penile blood 

flow, but Wolf refused it partly because he was not feeling any penile pain. Wolf was 

advised “that there was a risk of long-term erectile dysfunction from ischemic changes to 

the penis after prolonged priapism.” 

Wolf presented the video deposition testimony of his expert, Dr. Rutchik, to the 

jury. Dr. Rutchik is board certified in neurology and occupational environmental 
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medicine. His practice involved seeing patients with upper extremity injuries caused by 

vibration in the workplace. He did not treat Wolf, and had never treated a patient with 

either priapism or genital exposure to vibrations. He also had not evaluated the 

motorcycle seat and had no opinion regarding its design or ergonomics. He stated that he 

was not rendering any specific opinion about Wolf or Wolf’s condition. 

Dr. Rutchik stated that injuries caused by repetitive, occupational exposure to 

vibration were generally caused by months or years of exposure. He believed that 

exposure to vibrations could possibly cause injury to the cells and tissues of the perineum 

or genital area. He researched the medical literature looking for a relationship between 

priapism and vibration and did not find any instance where priapism was caused by 

vibration or motorcycle riding. 

McIntosh, a structural dynamics engineer, testified regarding the vibration that he 

measured from the BMW motorcycle. He testified that he had no opinion regarding the 

design of the Corbin-Pacific seat. 

Mike Corbin, the owner and CEO of Corbin-Pacific testified that the seat was 

designed to place pressure on the femur bones rather than the perineum. He stated that 

the seat was concave. He was unaware of any other case where the person experienced 

an erection or priapism from riding a motorcycle. 

In January 1993, BMW’s Service-Information on the 1993 BMW motorcycle 

K1100LT2 complained “of an uncomfortable level of vibration in the handlebars, seat 

and foot rest area.” The service manual explained what adjustments needed to be made 

and concluded: “We are convinced that this information will help eliminate vibration 

complaints effectively. [¶] Please remember when discussing complaints with your 

customers that it is not possible to eliminate all vibrations completely . . . .” 

Mark Yeldham, the special product investigation manager for BMW, testified that 

there was no significant difference between the K1100LT, Wolf’s BMW, and the 

K1100RS for purposes of vibration. BMW bolted both of these motorcycles directly to 

 

2 Wolf had the 1993 BMW K1100RS. 
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the frame without using rubber motor-mounts. He admitted that other motorcycles used 

rubber motor-mounts at the time Wolf’s motorcycle was designed and sold in the early 

1990s. Subsequently, BMW used rubber motor mounts on the K1200 design. He 

admitted that rubber motor mounts reduced vibration of the motorcycle. He also 

acknowledged that a balance shaft would reduce vibration. 

Yeldham rode Wolf’s motorcycle with the Corbin-Pacific seat during an 

inspection in connection with this litigation. He did not feel any undue pressure on any 

part of his body while riding and did not notice that the seat had a ridge-like shape. Other 

than Wolf’s claim, BMW had no information that anyone had made a claim alleging 

priapism as a result of riding a BMW or any other type of motorcycle. 

Dr. Robert Kessler, a board certified specialist in urology and Professor of 

Urology at the Stanford University Medical Center, spent 41 years diagnosing and 

treating patients afflicted with various urologic conditions, including priapism and 

erectile dysfunction. He had not seen or heard of a patient developing priapism as a 

result of riding a motorcycle; he had not read any reports or reviewed any literature 

indicating that vibration caused priapism. 

After the jury heard all the evidence, BMW and Corbin-Pacific moved to strike 

Dr. Rutchik’s testimony. They also moved for nonsuit on the issue of causation. On 

March 14, 2014, the trial court filed its order striking testimony of Dr. Rutchik and 

granting the motions for nonsuit. 

With regard to striking Dr. Rutchik’s testimony, the trial court explained: “Dr. 

Rutchik offered an opinion on general causation to wit: it is possible that vibration from 

the motorcycle on the order of magnitude measured by [Wolf’s] expert [Samuel]

McIntosh could cause injury to neural tissue in the vicinity of the perineum. He offered 

no opinion on the specific cause of [Wolf’s] priapism. Dr. Rutchik based his general 

causation opinion on a National Institute for Occupational Safety and Health (NIOSH) 

document which he described as a survey of published scientific literature intended to be 

used by OSHA for the purpose of standard setting and rule making. The primary inquiry 

of the document was occupational exposure to hand arm vibration. Hand arm vibration 
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syndrome is nerve damage secondary to exposure to vibration. Dr. Rutchik testified that 

he also relied on reports that vibration injury to the feet and legs and two Japanese studies 

that reported an increased incidence of erectile dysfunction among motorcyclists. . . . Dr. 

Rutchik testified that neural injury caused by vibration depended on a number of factors 

including the frequency, intensity and duration of the vibration and the susceptibility of 

the individual. He relied on no study or report of priapism caused by exposure to 

vibration. [¶] On this foundation, Dr. Rutchik said it was possible that vibration caused 

damage to [Wolf’s] neural tissue in the vicinity of the perineum. He offered no opinion 

as to the duration of the exposure that could cause this damages nor did he offer any 

opinion as to the latency period between exposure and symptoms. He offered no opinion 

as to how such damage would cause priapism in general. [¶] Dr. Rutchik’s opinion on 

general causation violates Evidence Code [section] 801 in that it is speculative and 

lacking in foundation. It is stricken.” 

The trial court ruled that a consequence of striking Dr. Rutchik’s testimony was 

that Wolf had no evidence of causation. Thus, his claims for negligence, strict product 

liability, negligent failure to warn, and negligent infliction of emotional distress failed. 

The court added that even if it did not strike Dr. Rutchik’s testimony, it would grant the 

motions for nonsuit because Wolf presented no evidence of specific causation. It noted 

that no witness testified as to how the vibration Wolf experienced during his four-hour 

motorcycle ride caused him to suffer a priapism. The court discounted Dr. McAninch’s

opinion because he is a urologist and unqualified to specify the way in which four hours 

of vibration would cause an injury resulting in priapism. Furthermore, he did not provide 

an opinion on how the vibration caused priapism. 

On April 3, 2014, the trial court entered judgment in favor of BMW and CorbinPacific against Wolf. Wolf filed a timely notice of appeal. 
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DISCUSSION

I. Wolf’s Defective Brief

BMW and Corbin-Pacific contend that we should dismiss Wolf’s appeal because 

his opening appellate brief fails to comply with the rules of appellate procedure. We 

agree. 

California Rules of Court, rule 8.2043 prescribes the mandatory format 

requirements for appellate briefs. Rule 8.204(a)(1)(A) provides that the brief must begin 

with a table of authorities that separately lists the cases, statutes, rules, and other 

authorities cited. Wolf’s opening brief has a table of authorities, but it does not list any 

of the cases or statutes cited in his brief. Additionally, rule 8.204(a)(1)(C) requires a 

citation to the record to support any factual reference. Wolf frequently refers to facts and 

quotes testimony without providing any citation to the record. Additionally, rule 

8.208(b) and (d)(1) requires the brief to include a certificate of interested entities or 

persons. No such certificate appears in Wolf’s brief.

Most significantly, Wolf’s opening appellate brief contains no intelligible 

argument. Rule 8.204(a)(1)(B) requires that each point must be supported by argument 

and, if possible, by citation of authority. After setting forth the facts in 38 pages and the 

standard of review in almost three pages, Wolf’s entire argument challenging the trial 

court’s granting of a nonsuit against his tort claims is the following: “Based on the 

foregoing legal standards and facts, Appellant’s claims for strict product liability, 

negligence, negligent infliction of emotional distress and all other causes of action were 

viable so it was error for the trial court to grant nonsuit for lack of causation (see above).” 

This conclusory statement, which does not set forth the elements of his causes of action, 

fails to cite any legal authorities, and omits any legal analysis is completely inadequate. 

“ ‘ “An appellate court cannot assume the task of discovering the error in a ruling 

and it is the duty of counsel by argument and the citation of authority to show the reasons 

why the rulings complained of are erroneous. Contentions supported neither by argument 

 

3 All further rule references are to the California Rules of Court. 
10

nor by citation of authority are deemed to be without foundation and to have been 

abandoned.” ’ ” (In re Phoenix (2009) 47 Cal.4th 835, 845; see also Berger v. Godden 

(1985) 163 Cal.App.3d 1113, 1119 [the “failure of an appellant in a civil action to

articulate any pertinent or intelligible legal argument in an opening brief may, in the 

discretion of the court, be deemed an abandonment of the appeal justifying dismissal”].) 

An appellant must prove that a trial court’s rulings are incorrect “by presenting legal 

authority on each point made and factual analysis, supported by appropriate citations to 

the material facts in the record; otherwise, the argument may be deemed forfeited.” 

(Keyes v. Bowen (2010) 189 Cal.App.4th 647, 655.) “One cannot simply say the [trial] 

court erred, and leave it up to the appellate court to figure out why.” (Niko v. Foreman 

(2006) 144 Cal.App.4th 344, 368.) The appellate court need not furnish argument or 

search the record to ascertain whether there is support for appellant’s contentions. 

(Mansell v. Board of Administration (1994) 30 Cal.App.4th 539, 545-546.) 

Here, Wolf’s opening brief failed to make any arguments to support any theory of 

error. (See Berger v. Godden, supra, 163 Cal.App.3d at p. 1120.) “[A]ppellant’s failure 

to present any pertinent or intelligible legal argument in his opening brief constitutes an 

abandonment of the appeal . . . . In this circumstance, dismissal of the appeal, with no 

consideration on the merits as to the correctness of the judgment . . . from which the

appeal is taken, is the proper disposition.” (Ibid.)

Wolf did provide some legal argument in his reply brief. However, it is well 

settled that arguments raised for the first time in an appellant’s reply brief are forfeited 

unless good reason has been shown for failure to raise them. (Garcia v. McCutchen 

(1997) 16 Cal.4th 469, 482, fn. 10.) Such arguments deprive the respondent of an 

opportunity to counter the argument. (American Drug Stores, Inc. v. Stroh (1992) 10 

Cal.App.4th 1446, 1453.) 

Although Wolf’s appellate brief is woefully inadequate, we exercise our discretion 

to consider his appeal on its merits. 

II. Standard of Review

A motion for nonsuit operates as a demurrer to the plaintiff’s evidence. “ ‘A 
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defendant is entitled to a nonsuit if the trial court determines that, as a matter of law, the 

evidence presented by plaintiff is insufficient to permit [the trier of fact] to find in his [or 

her] favor. [Citation.] “In determining whether the plaintiff’s evidence is sufficient, the 

court may not weigh the evidence or consider the credibility of witnesses. Instead, the 

evidence most favorable to plaintiff must be accepted as true and conflicting evidence 

must be disregarded. The court must give ‘to the plaintiff[’s] evidence all the value to 

which it is legally entitled, . . . indulging every legitimate inference which may be drawn 

from the evidence in plaintiff’[s] favor.’ ” [Citation.] A mere “scintilla of evidence” 

does not create a conflict . . . ; “there must be substantial evidence to create the necessary 

conflict.” [Citation.]’ ” (Santa Barbara Pistachio Ranch v. Chowchilla Water Dist. 

(2001) 88 Cal.App.4th 439, 444, italics omitted.)

“ ‘In reviewing a grant of nonsuit, we are “guided by the same rule requiring

evaluation of the evidence in the light most favorable to the plaintiff.” [Citation.] We 

will not sustain the judgment “ ‘unless interpreting the evidence most favorably to 

plaintiff’s case and most strongly against the defendant and resolving all presumptions,

inferences and doubts in favor of the plaintiff a judgment for the defendant is required as 

a matter of law.’ ” [Citation.]’ [Citations.]” (Santa Barbara Pistachio Ranch v. 

Chowchilla Water Dist., supra, 88 Cal.App.4th at p. 444.) 

III. Wolf Failed to Present Evidence of Causation

The trial court granted BMW and Corbin-Pacific’s motion for nonsuit on Wolf ‘s 

claims for negligence, negligent infliction of emotional distress, and product liability.

4 

Wolf claimed that he suffered “a severe case of priapism” that “was caused by the ridgelike seat on his motorcycle, negligently designed, manufactured and/or installed” by 

BMW and Corbin-Pacific. 

Wolf contends that the testimony of his experts—Doctors Rutchik and 

McAninch—provided sufficient evidence from which a trier of fact could have found 

 

4 Wolf’s product liability cause of action was based on strict liability and 

negligent failure to warn. 
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BMW and/or Corbin-Pacific liable on either negligence or strict product liability theories, 

under a consumer expectations test. (See Barker v. Lull Engineering Co. (1978) 20 

Cal.3d 413, 430.) Under this test, a product is defective in design if it “fail[s] to perform 

as safely as an ordinary consumer would expect.” (Soule v. General Motors Corp. (1994) 

8 Cal.4th 548, 562 (Soule).) “[I]n addition to establishing a prima facie case regarding 

causation, the plaintiff must also produce evidence that the product failed to satisfy 

ordinary consumer expectations as to safety.” (Campbell v. General Motors Corp. 

(1982) 32 Cal.3d 112, 126.) The consumer expectations test is properly applied in “cases 

in which the everyday experience of the product’s users permits a conclusion that the 

product’s design violated minimum safety assumptions, and is thus defective regardless 

of expert opinion about the merits of the design.” (Soule, at pp. 567-568.) 

Any theory of negligence or product liability requires evidence of causation.5 

(See, e.g., Soule, supra, 8 Cal.4th at p. 560 [a manufacturer, distributor, or retailer is 

liable in tort if the defect in the manufacture or design of its product causes injury while 

the product is being used in reasonably foreseeable manner].) The law is well settled that 

a plaintiff cannot recover damages based upon speculation or a mere possibility that the 

wrongful conduct of the defendant caused the harm. (Williams v. Wraxall (1995) 33 

Cal.App.4th 120, 133; Jones v. Ortho Pharmaceutical Corp. (1985) 163 Cal.App.3d 396, 

402.) Evidence of causation must rise to the level of a reasonable probability based upon 

competent testimony. (Budd v. Nixen (1971) 6 Cal.3d 195, 200.) 

Even if we presume that the trial court abused its discretion in striking Dr. 

Rutchik’s testimony and we consider this testimony on the issue of causation, Wolf 

cannot prevail because his evidence on causation was insufficient as a matter of law. Dr. 

Rutchik, never treated Wolf, and never treated a patient with either priapism or genital 

 

5 Wolf also asserts that the doctrine of res ipsa loquitur applies, which impacts the 

burden of producing evidence. Wolf’s inability to provide evidence that the seat caused 

his injury defeats any claim that this doctrine applies. (See, e.g., Ybarra v. Spangard 

(1944) 25 Cal.2d 486, 489 [injury must be caused “by an agency or instrumentality 

within the exclusive control of the defendant”].) 
13

exposure to vibrations. He did not evaluate the motorcycle seat and had no opinion 

regarding its design or ergonomics. He stated that he was not rendering any specific 

opinion about Wolf or Wolf’s condition. He testified that exposure to vibrations could 

possibly cause injury to the cells and tissues of the perineum or genital area. 

Dr. Rutchik’s testimony did not establish causation. He had no opinion as to what 

caused Wolf’s priapism, and was able to claim only that there was a possibility that the 

vibration on the seat caused Wolf’s condition. 

Wolf also presented the testimony of Dr. McAninch, who opined that Wolf’s 

condition was caused by perineal trauma experienced during the motorcycle ride. Dr. 

McAninch, however, could not state with any reasonable degree of medical certainty that 

Wolf would not have had a priapism if he had not taken the motorcycle ride. He 

acknowledged that sitting on any type of seat could have caused Wolf’s injury, and 

expressed no opinion about the design of the Corbin-Pacific seat. He acknowledged that 

he had never heard of or encountered a case where a motorcycle ride caused or was 

suspected of causing a priapism. He did not provide any opinion as to how the vibration 

caused the priapism. This evidence was insufficient to establish causation as Dr. 

McAninch did not connect any aspect of the seat design to Wolf’s priapism. 

Wolf failed to present any admissible evidence that his motorcycle ride or the 

vibrations from the motorcycle seat caused him to suffer a priapism. Accordingly, the 

trial court correctly granted a nonsuit on his negligence and product liability claims.

DISPOSITION

The judgment is affirmed. Wolf is to pay the costs of appeal. 
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_________________________

Kline, P.J.

We concur:

_________________________

Richman, J.

_________________________

Stewart, J.

Wolf v. BMW North America, LLC et al. (A141814)