Massive Pileup on the “Mountain of Hell” Bike Race

I've never heard of this but there is a annual bike race in the French Alps called "Mountain Of Hell" and it looks insane. It's a 15-mile course of snow, ice, rocks and dirt. About 700 riders take off at the same time. I know, you're thinking what could go wrong? Not surprisingly there's a massive pile up and it's started by one guy. Luckily no one was seriously injured. The winner was clocked at 78 miles per hour.