ive been looking for seths part in focuse i believe. ive been looking for this forever. the one where he sends that huge ass cliff in the beginning. its the one with the song dramamine by modest mouse.
"I'm one of the most active kids in the world and when you take that away from me thats like taking medicine away from a dieing person thank god for those three months" Tanner Hall
Here is a clip of the backflip you are talking about, but I couldn't find the whole segment which sucks. Seth's segment in focused is incredible, and I think this is probably the dopest backflip in big mountain skiing history.
It's on youtube somewhere with "Seth" or "Seth Morrison" or something like that as a title. It was an older video that got deleted but it's back...I'd search for it now but I'm at school and youtube is blocked.