I recommend watching the whole video, but for the spiciest part skip to 1:15, when the guy nearly hits the ground. That was a very close call.
This guy must be a total adrenaline junkie. I liked how a Youtube user described this video in their comment:
How the hell can he glide with balls that big?!?!
Wingsuit flying is the sport of flying the human body through the air using a special jumpsuit, called a wingsuit, which adds surface area to the human body to enable a significant increase in lift.
Definition via wikipedia.org