Around here there's a guy who rides a ratty old Honda Rebel 450. He obviously has a throttle lock or something and he likes to lie back on the seat like it was a Lazy Boy and prop his feet up on the tank with his hands folded behind his head.
I was on an organized ride once and saw him doing this for a couple of miles, just steering with his body. Needless to say, I made sure I was pretty far away from him. Even crazier, I saw him doing it by himself in traffic one day, just tooling down the highway. If any of you have ever experienced San Juan, Puerto Rico traffic, you'll understand just how nuts that is.