You know how neighborhood kids keep jumping onto your car's rear bumper and hitching a free ride? Doesn't it get you steamed when you see their grinning faces in your rearview, smug in the knowledge that they're stealing your hard-earned engine sap? These days, you'll probably have to rely on the fact that bumpers are mostly integrated into the car's body and thus make a poor riding surface, but back in 1936 you could just rig up an ignition coil and a big chain dragging on the ground to apply some high-voltage behavior correction! [Modern Mechanix, via BoingBoing]