Polish inventor Jack Skopinski recently debuted his latest electric people-mover: a set of battery-powered "off-road" rollerblades that handle dirt trails as well as they do city streets. Each boot is outfitted with a 350 W DC motor that propels the rider for up to 12 miles at speeds topping 9 MPH. Rather than proper wheels, these rollerblades sit atop rubber treads enabling riders to scoot across grass, gravel and dirt tracks with ease, if the promotional video (below) is any indication. The entire system is controlled by a wired, hand-held remote.