An Australian man has built a Tesla Coil that rotates around a car and generates a force field of electric fun to thwart thieves and super-villains.
This uses a motorized 6 foot aluminium tube connected to the top of the TC. The sparks will come mostly from the end of the tube and will trace out a circle slowly (about 10 seconds per rotation). The effect is dramatic on a long time exposure where a complete ring of sparks will be seen . Motor is a 24 V aircraft control motor with solid reduction gears and a cast alloy casing run from a 12 V SLA battery after I toasted a 9.6 V NiCad.