I have a friend who was in a head-on with a truck. He had to get cut out of his vehicle. He had multiple compound fractures. The EMTs claim he was totally chill and told them if they could just get him out of the vehicle he'd be alright, and they were taken aback by how calm he was. My friend doesn't remember any of it. It's shock. Snowboarder guy is probably in shock, and also low on oxygen.