X Games Snowmobile Rider in Critical Condition: Although he walked away from the huge snowmobile crash he suffered Thursday during the Winter X Games and was diagnosed with a concussion, Caleb Moore developed bleeding around his heart and brain complications and is hospitalized in critical condition. The 25-year-old athlete crashed while doing a backflip and his 450-pound Polaris snowmobile landed on him. "The prognosis is not good at all. It's almost certain he's not going to make it," his grandfather Charles Moore told the Denver Post. No competitor has died during the 17-year history of the Winter X Games.