Ryan Van Duzer was back in the desert of Nevada to attend the famous Burning Man festival—and its wild and crazy ultramarathon that’s part of the fun.

This video shows just what Van Duzer encounters during his 50K run amidst other Burning Man participants. From a naked guy pulling a chariot to two people in shark costumes chasing runners, the only thing you can expect at this race is the unexpected.

So how does race director Cherie Yanked manage to get 200 runners to run 31 miles in the Nevada desert during the summertime?

“Burning Man attracts the crazy crowd, and ultrarunners are a little crazy,” she said. “It’s pretty easy.”