content: Oh, I know. My son did similar shit on a mountain bike. He can bunny hop that thing up the stairs sideways, jump from object to object, and do a ton of stupid shit on one. It amuses me greatly to watch this - but it amuses me even more when he bumps into stuff, like the ground. Play stupid games, win stupid prizes. He's mostly grown out of it now. He'll be here in just a couple of days, up for the holidays. I'll get him to ride a unicycle for me. He does amazingly stupid things on that. He did dirtbike for a while, but he got over that pretty quickly. It was good fun to watch him. I bought him all the safety equipment, including the fancy hard vest thingies they wear. He'd tear off and go find new and creative ways to break himself or the bikes.  For a while, he was into half-pipe and biking on that. That was good for a few trips to the ER. This, also, amused me greatly. I'll buy him another bike, right fucking now, if he wants one - so long as he promises to use it in a reckless manner and attempt stupid things. Google Surgarloaf Mountain - in Maine. He tried to bike down that at speeds faster than the professionals. He was a full ten seconds ahead of the top time when he hit the corner that turned into the day he gave up his aspirations for professional biking. Funniest thing I've ever seen.