There was a horrific crash during today's stage of the Tour de France (in Belgium), which I watched live starting at six o'clock this morning. Here is video. Here are images. Danish rider Jakob Fuglsang said after the race that the riders were going 80 kilometers per hour at the time of the crash, which is 49.7 miles per hour. The race was stopped for about 20 minutes to allow doctors to tend to the injured. Race leader Fabian Cancellara broke two vertebrae in the crash. Though he finished the stage, he dropped out afterward. The winner of today's stage, Joaquin Rodriguez, averaged 28.7 miles per hour for 99.1 miles.
Addendum: This story describes the carnage.