This lunatic is 44-year-old Greg Hancock. He's a Motorcycle Speedway world champion three times over. Last year, he had his left hand sucked into a competitor's rear tire. During a race. At speed. Because he's more man than should be possible by evolutionary standards, he missed one race, then got back to kicking his 70-horsepower, alcohol-fueled, brakeless death machine around a dirt oval to take the championship.

That's impressive. More impressive? Last month, he handed Chris Cantle the handlebars and tried his best to teach him how to sling his race bike around a track. Everyone survived, if only by luck. You can read Cantle's hilarious account of the shenanigans here. You won't be disappointed.