I remember seeing a show on TV about "urban wheeling." But it wasn't just some guys and their jeeps, it was an actual rockcrawling contest. It was all guys and their tube buggies. I don't really remember much about the obstacles except for one thing. There was a big pipe, like 8 foot diameter or something and they had to go in the pipe and turn around inside the pipe and drive out the way they came in. Of all the contestants only one was able to do it, he had to use every trick he had, rear wheel disconnects, wheel brakes and all that fancy stuff competition rockcrawlers have.
That's not considered to be Urban Wheeling when it is on a prepared course.