The conceptual BMW Halbo is one tiny motorcycle. According to the designer, it only takes up half as much space as your average bike. It's got your standard wheel up front with a motor built into it, and the rear wheel is actually spherical, mounted on an arm that can move from side to side to help keep the whole thing balanced. That's good, because falling off this thing or getting in a collision looks like it'd be fatal.
Designer Pierre Yohanes Lubis reckons the bike would be good for "eco-minded young individuals," though he should probably add thrill-seeker in there somewhere. Check out the gallery below for more of the Halbo.