I love that vid. Jeb Corliss does some cool things. He spent many years as one of those loopy base jumpers.
Check youtube for Jeb Corliss at table mountain, a little bit later on from "Grinding the Crack". He crashed during the stunt where he flies through the balloons! He wasn't badly broken, but had skin grafts etc on his legs and is still recovering (but still flying!).
Also check out Tianmen Cave (earlier this year?) when they had the World Wingsuit Chanpionship. Jeb is also the first person to have flown through Tianmen cave.
And do you want to know what really sucks? His girlfriend is a champion parachutist, wingsuit pilot, and model Roberta Mancino. Some people have all the fun!