A professional snowboarder has worked his way into the history books of skateboarding, landing what's being called the first-ever double backflip. 

On the afternoon of May 26 at Woodward action sports camp in Pennsylvania, 18-year-old Trevor Jacob, who was wearing a helmet but no other protective pads, dropped down the roll-in at Woodward's Lot 8 building, grabbed his inside rail, launched off the resi-jump, and spun twice before rolling away cleanly across a safety-mat landing pad. 

"[It was] pretty random because I wasn't even planning on trying it," Jacob says in a video documenting the groundbreaking trick. " I just gave it a go and ended up getting it." 

"[It's] a double cork [or] double backflip," he says. " Whatever you want to call it." 

Therein lies the issue. 

Reached for comment via text messaging, MegaRamp pioneer Danny Way clarified that Jacob's trick is technically "not a flip." 

Way submits that it's truly an off-axis frontside 720, adding that there's a "big difference in the approach and rotation between flipping and spinning off-axis. 

"There's a huge difference in corked rotations and straight-up flips.  Night-and-day difference in the take off and the commitment with flipping ... I have experimented with double backs and frontside corked 720s on the Mega. [ With] frontside 720s, you look over your shoulder on take off, giving you a view of the ramp most of the time throughout [your] rotation, which gives you an easy exit if you make a mistake. [ During] a real flip, there is no exit.  Blind the whole way.  And you must complete the second flip or you're breaking your neck." 

"It's nice to see ... kids hyped on [the] Mega and [that] Woodward has the little launch into the foam for kids to experiment," Way added. 

Jacob, who hails from Malibu, Calif., and resides in Mammoth Lakes, could not be immediately reached for comment. 

On Tuesday night in Alliance, Ohio, Jacob and friend Taylor Woods -- who are currently skateboarding across the country -- were arrested for railroad vandalism and criminal trespassing after being discovered hiding under a tarp on a westbound Norfolk & Southern train, according to an officer at the Stark County Jail.  They are expected to be released by midnight Wednesday. 

In December, Jacob, who's the youngest finalist in U.S. Open halfpipe history, told snowboardermag.com that he's done backflips on skateboards, wakeboards, snowboards, dirt bikes, snow mobiles, skis, mountain bikes, "and a mattress."