I've heard that lightning or extreme heat can make transformers blow. Well, I've had it happen near me twice recently, and neither time was due to lightning (AFAIK) or heat (it's winter). One time coincided with a car hitting a pole (actually, the supporting wires that are keeping it from falling over). The force caused the wires to oscillate quite a bit, so I have to assume that it caused the transformer to blow, about a quarter mile away, and we lost power. But why? Why would a physical jolt take out a transformer? The other time was on a really windy day. The transformer outside our workplace blew and we lost power. Again, the same factor, physical motion, seems to be at work here. Can someone explain to this ignorant one why transformers like blowing up so much?