this is in chamonix, france, henrik henrikson going down this run with his buddies, looks like he's last in line with his friends until watch this, watch to the left. big avalanche comes out of nowhere and henrik says it felt like being swept up by a big wave. he has no idea what caused this thing, but you can see takes him out. >> yeah, look at that view of snow coming over your head. it does look like a wave. >> yeah. you can hear him screaming. >> oh, gosh and then it goes completely blank. that's creepy. >> keep in mind the camera is on tom of his helmet here, so if the camera's getting buried, think about where his head is. listen to this. >> ahh! >> he's screaming at the top of his head for help. he was able to free his one left arm and then carve out an air passageway. although he sounds frantic in this video he kind of tried to remain calm. he knew his friends were there. he knew his friends knew where he was. his friends are able to locate him pretty quickly. >> but look when his buddy comes over right away, listen to his friend. his friend is, like, laughing, whoo-hoo, what a r