Wow, that's really too bad. It makes me think of last winter when I took my brother snowboarding. He had never been to a ski hill before, I loaned him my helmet and he spent a few hours getting used to the board on a tiny slope. He finally felt ready to take one try at the bunny hill, so down we went. He did pretty good, fell two or three times, but not so bad. One of the falls had his helmeted head crack (and I mean crack) off a patch of ice. He got up, smiled and me and said, "Good thing you loaned me your helmet." It never really hit me how dramatic of an understatement that was. Certainly if he wasn't wearing the helmet it would have at the very least ended our day, and at worst ended his life. I'm certian it would have been a fairly severe injury anyway, and instead it was just another tiny detail in a fun day at the skihill. Wear helmets.