If you like to watch normal people attempt abnormal shit in beautiful places, I recommend
Inspired to Ride and
The Barkley Marathons: The Race that Eats its Young.
Inspired to Ride is about the
Tran Am bike race - a completely self-supported bike race across the US.
The Barkley Marathons is about the hardest ultra race in the world - one in which almost no one ever finishes.
They'll either get you juiced to do your own stupid human trick or make you curl up into a ball on your couch.