Land Sledding? Jackass?

Shoot. I just thought to add this. While Mary and I were down at Wildwood on Sunday some kids came down and hooked some kind of plastic thing to back seat of a minivan and then dragged the "sled" with a kid sitting on it around the parking lot!
Eventually, the rider fell off, usually around the turn. I do like the fact that the one kid(pictured) put his hood up as protection. When I was a kid, we boot hopped cars and hopped trains but this seems a little more, shall we say, advanced?