My mom's been following this closely. Yep, she fell while skiing and went back to her hotel, completely fine. Then she felt real sick, was taken to the hospital and ended up in critical condition. The fact that she didn't feel anything was wrong after the fall, and was able to function, is amazing to me, and very scary.
They should make helmets mandatory on ski hills. It's already mandatory for kids here, since a little boy at one of our ski hills hit a tree and died because he had no helmet on... So sad.