norwegian skier henrich henrichson 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 to the left. henrich says it felt like being swept up by a big wave. he has no idea what caused this thing. you can see, takes him out. >> look at that. snow coming over your head like that. that looks like a wave. >> you can hear him screaming. >> oh, gosh. then it goes completely blank. >> that's creepy. >> keep in mind, the camera is on top of his helmet here. so if the camera is getting buried, think about where his head is. listen to this. he's screaming at the top of his lungs for help. he was able to free his one left arm and then carve out an air passageway. though he sounds frantic in this video, he tries 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. listen when his buddy comes over right away, listen to his friend. >> he's laughing, like, whoo, what a rush. >> his frien