http://www.youtube.com/watch?v=6jyraFLqfqE&NR=1
...over 5,000rpm using four AA batteries, two ball bearings, small screw, fine copper wire and neo magnets. Homopolar rotation is caused when current flows through the metal jacket of the neo magnet. This causes a perpendicular right handed force (Lorentz Law). WHY this occurs is still a mystery to science. The right hand spin is possibly a universal force and is closely connected to both electrical current and magnetic fields and may also be responsible for gravitational and inertial effects.
