Remember those insane little hopping-machines in playgrounds, shaped like little animals attached to springs, and you sit on it and can jump up and down by about 5 inches? This is the adult, Jackass-esque version. Hours of fun! Hours spent in A&E! According to the designer, Martin Buehler, it's a ''prototype jockey ridden hopping robot that controlled forward speed, hopping height, and pitch balance, the jockey did sideways balance and steering." I had to read that sentence over about five times before it made sense, you too? Check out the video of it...