I have to admit, I enjoyed watching this guy ride his quad around on two wheels. (Matter of fact, it convinced me that I could do it on my son's quad.) I also have to admit I don't always wear my helmet when I'm riding with my sons, because I'm usually not going very fast. (If you watch many of my videos, you'll see that).

Anyway, this guy was pretty good. He was quite aware of everyone around him and seemed to be in control the entire time, so I'm not too concerned about him getting hurt or hurting someone else, but I wouldn't suggest anyone do this sort of thing without proper gear.