I think a lack of helmet is the last of this guy's concerns. He could be wearing a helmet like Rick Moranis in Spaceballs and it wouldn't do him any good if he fell. But the worst thing is, would you look at how OLD that bike is?! The poor guy probably barely had the horsepower to make it on the "up side" of the rope, and the steering-head-shake that starts at 2 miles per hour alone should have killed him!