"From conception to fruition, a team from Charles W. Davidson College of Engineering  has spent more than a year on this ambitious senior project called Spherical Drive System: a self-balancing, electric motorcycle that uses spheres as wheels.

The ball transfer units, which are small ball bearings, keep the spheres moving. Spheres allow omnidirectional movement, meaning that this motorcycle could move in any direction, including backwards and sideways."    Via: