Sketching.

I've done a number of remarkably stupid things in my life. Here is one of them.

Me and an elite group of friends who for the undeniable ridiculosity (new word) of the actions will remain nameless, used to pull ourselves behind an old import minivan of sorts with a ski-rope. We started out riding on Dan's (oops, there goes the anonymity) skateboard and we called it sketching. This minivan/compact car had dual sliding doors, long before that was the thing to do, and it had a ball hitch on the back. We ran into a problem very quickly when pulling the skateboard. The wheels on the board offered no resistance. I'll explain why this is a problem (odd the things you encounter when pulling someone behind a car). If the car slows at all the rider rolls under the bumper and into the tailpipe. This is dangerous. A solution was drafted and "Sketchy Sketching" was born.
We started by sitting on an Igloo cooler lid. The noise was awful. And the friction was almost too much. The hands and arms tired quickly. We needed wheels, just not very good ones. We pulled the seat and back off of an office chair, put the half melted cooler lid on the back two wheels, sat on it with legs around the center post straight forward and we achieved perfection. Up and down the street, through the adjacent graveyard, even in the library parking garage, athletes in a brave new sport, with no method of scoring.
We went so far as to ride atop construction barrels. It's all well documented on video tape, soundtrack by Rusted Root. Send me on my way.