There's a bike race that takes place in the French Alps every year called the "Mountain of Hell" . . . and there's video of a massive pileup that went down soon after it started on Sunday.Luckily, there were no serious injuries. The beginning of the race looks like a crash waiting to happen.There are 700 riders taking off at the SAME TIME, and they're traveling down a snowy glacier.All it took was one guy to fall and that caused a chain reaction. If you're into extreme sports, the race itself is pretty fascinating.It's a 15-mile course of snow, ice, rocks, and dirt . . . and the guy who won it this year was clocked at 78 miles per hour.Keep in mind, he's going down a mountain.