I saw this on the news and it made the kid in me jump up and down. It's Nasgrass - lawn mower racing. The news report said that they tweek them up so that some of them can do 80 mph.

I think I need to go tinker with my riding lawnmower some. \:\) I can pop a wheelie on it by popping the clutch, but I think there's more potential there. \:D