A YouTube video posted on Sunday shows a wingsuit diver pulling off an amazing stunt: flying directly through an approximately 30-foot-wide fissure in a mountain.

According to an article posted in The Northern Star, Jeb Corliss jumped from a helicopter on Saturday with the intent to fly through the crack in the 984-foot Langshan Mountain in China’s Zhejiang Province.

Corliss, 37, is also a BASE jumper and has been skydiving since he was 18 years old. He has jumped off the Golden Gate Bridge, the Eiffel Tower, and Venezuela’s Angel Falls.

“This is the greatest thing I’ve ever done up to this point. I am just so, so happy that we were able to do it,” he told reporters after the jump. His most recent stunt flying through the fissure has been named “The Flying Dagger,” for which he trained thoroughly for.

An article on Outside details Corliss’ jump and the revolutionary new technology that went into making it a success. Despite the 21 deaths that have resulted from people BASE jumping this year, Corliss continues to progress in the sport—but that’s not to say he has never run into trouble. In 2012, he crashed into Table Mountain in South Africa at a speed of more than 100 miles per hour.

The Langshan feat was captured on Corliss’ helmet camera and can be seen in the video below.

http://youtu.be/7S0WidSnYXY

Corliss said he was first contacted about doing “The Flying Dagger” stunt by Frank Yang of Pan Pacific Entertainment back in the spring, who wanted to figure out if it was possible to fly through the crack.

“Normally, when non-jumpers come to me with something like that, I’m really skeptical,” he told Outside. “They don’t really understand what we do.”

He said it was the preciseness of the flight that made this jump so difficult. He said in the past he has hit the string on balloons or flown through a waterfall, but only for two seconds at most. With this stunt, Corliss needed to be precise for approximately 10 to 30 seconds, which he said makes an enormous difference.

To help train, he used augmented reality.

“I actually just went to Hungary where we are using augmented reality to test our ability to render this mountain or canyon in space,” he told Outside. “So, I am able to jump out of an airplane and picture flying through the canyon three times during each jump. This thing is rendered three dimensionally in front of me. It was interesting training, and I would say I impacted about 50 percent of the time.”

He said it was what happened after he went through the fissure that worried him, as he wouldn’t have another chance to gain altitude, forcing him to deploy his parachute at an altitude that is too low. He credited the team of people behind him for the successful stunt.

Image from Howcheng on the Wikimedia Commons