Transcript for British Stuntman Killed in Swiss Alps During Wingsuit Flight
Tonight a high flying tragedy for the man who stole the show at the opening of the olympics in england. He joined other dare devils in a leap from the mountains today and it resulted in a fatal mistake. Ryan owens has that. Reporter: He had the world holding its breath, jumping from a helicopter dressed as james bond and gliding with that union jack parachute right into olympic stadium in london during the ceremonies last year. But mark sutton wore another kind of suit, a winged suit. What people can do in them may be as dangerous as anything 007 ever did. Sutton even had a youtube channel to demonstrate how the stuts allowed him to fly faster and maneuver around mountains. But today the 42-year-old leaped from a helicopter more than 10,000 feet above theal ps, and slammed into the side of a mountain, dying instantly. Investigators are now trying to figure out what went wrong. I'll show you how it regime works. Reporter: This man has done these jumps hundreds of times. Look closely and you see a plane flying by him. The people doing it accept the risk. If you are doing this you dreamed of doing it. Reporter: It's a sport undeniably cool, allowing humans to take flight to thread an impossibly scary needle, like plunging through this hole in a chinese cave, all with such precision the best can hit a balloon this close to the ground. It's so thrilling because it looks so dangerous. Tonight a deadly reminder it really is. Ryan owens, abc news, los angeles.
This transcript has been automatically generated and may not be 100% accurate.