Lindsey Jacobellis of the U.S.m a snowboard rider, raced out to a huge lead in the women's snowboard cross final, and appeared to have gold wrapped up. But she fell after the penultimate jump (because she was showing off) allowing Switzerland's Tanja Frieden to slide in front and take the gold medal.
Video here: http://www.nbcolympics.com/snowboarding/index.html (on the side)
