and here's the young guy that designed and builds them! Tyler Hadziki, in San Diego (the video shows how cool they spin )
in the above photo, you can see the the rear wheels have a steering handle, and give it a precise rear steering for stunts, tricks, and drifting
Gizmag: "If you really want to have some fun"
Guyism: "Finally, a stunt tricycle exists"
Hight3ch: "Something that hasn't been done before"