A cross between motocross and skateboarding, the StealthMan is a very unique standup-while-you-ride extreme sports machine. It uses a 50-cc enigine, like those typically found in brush cutters, to launch riders off ramps at 22 mph. The Wheelman Corporation in Austrailia produces three separate models. The StealthMan – $1,685, CruiseMan – $1,200, and the BushPig – $1,495.