At the close of today's stage of the Tour de France, cyclist Mark Renshaw headbutted opponent Julian Dean. Yes, headbutted. Not like after the stage was over and they got in a fight while they were standing around by their bikes. Like, during the race, with his helmet. Here's the official description from YouTube, since I know nothing about this sport:

Mark Renshaw head butts Julian Dean as Dean comes up next to him and puts an elbow out. Then after Renshaw leads out Mark Cavendish, he looks to his left and sees Tyler Farrar coming up so he drifts to his left, coming off his line, and Mark Renshaw almost puts Farrar into the barrier. Mark Renshaw is later disqualified and thrown out of the 2010 Tour de France for the head butt to Julian Dean.

Watch the video after the jump.