Saw a skier get pretty messed up in Whistler a couple months ago. I witnessed this from the chairlift, the guy was trying to do a small but steep run that was extremely icy. He lost an edge and slammed his face into the ground hard, as the chair got over where he was I yelled to him asking if he needed help. He couldn't really talk, he was very out of it. His face was bloody and was trying to stand and grab his gear that was strewn about. He was falling over as he tried to stand. At the top of the lift I told the lifty what happened and where he fell and they sent patrol in to get him. He wasn't wearing a helmet but I am not sure if one would have helped anyway.