Corliss jumped out of a helicopter, piloted himself toward Mount Jianlang, and flew through a narrow crack in the face of the mountain at a full speed of 122 miles per hour. The crack was 15-feet wide at the bottom and 60-feet wide at the top. The area he passed through was 30-feet wide, according to Outside Magazine.
Here's what it looked like from the camera mounted on his helmet (more below):
As you can see from the video (below), it looks like Corliss is going to fly through the larger gap on the right side of the mountain at first. But then a smaller one on the left comes into view.
He called it the greatest flight of his career when it was all over.
Another view from his wing:
Here's the full video. The action begins at the 4-minute mark: