i was in a lab at college when an EE major friend of mine accidentally shorted 36v from three very very large high capacity 12v electric car batteries (this was in the late 90s, they weighed about 50lbs each) to the frame of a ground rover robot. It instantly welded the vice grips to the frame and then after about 3 seconds both ends of the vice grips blew off breaking the circuit. i hate dealing with electricity.