VIDEO: Speedrider's GoPro Shows Heart-Stopping Ride Down Utah Slope With Skis, Parachute

Jon DeVore, Andy Farrington of Red Bull Air Force attempt Utah's High Ivory.

— -- Of the handful of extreme athletes pioneering the sport of speedriding, Jon DeVore might just be the most fanatic.

“Speedriding is a perfect blend of big mountain skiing and high-performance parachute flying and what it does is allow people like myself to go to terrain and do lines that were never thought ride-able before because they closed out in big crevasses or big cliffs,” DeVore said.

Watch the full story on "Nightline" tonight at 12:35 a.m. ET

Eventually, he found speedriding, which allowed him to push the limits on both. DeVore is now sponsored by Red Bull and is the manager of the Red Bull Air Force, a team of professional pilots, BASE jumpers, skydivers and para-gliders. DeVore is also featured in a new RedBull documentary, "The Unrideables: Alaska Range," available now on RedBullTV.

“Some people might go to a shrink and talk to a doctor, other people might do something else to find a way to shut their mind off but for me you know when I get out to the air that’s when – that’s my meditation. That’s why I call this my air therapy,” DeVore said.

“I think it’s very special and very lucky to be able to turn my passion into my profession. I feel like I got a shooting star.”

“The scariest part of speedriding is that if you land heavy on your skis and you unload pressure, and you don’t have taut lines, the canopy doesn’t know what to do,” DeVore said.

But while on his jump, DeVore ran into trouble, and tore his ACL. In 21 years as a professional extreme athlete, who even worked as a stuntman in “Iron Man,” “Iron Man 3” and “Transformers 3,” it was his first injury in a line of work that has killed many.

So DeVore sent “Nightline” back up with Farrington to try the High Ivory run again.

Watch the video of Farrington’s run HERE and in the video player above. See the full story on “Nightline” tonight at 12:35 a.m. ET.