Then we noticed that the stove was smoking. To be precise, the wooden drawers under the stove were smoking, and switching off all the burners failed to extinguish either the big red "ON" light or the smoke. My Bride grabbed the fire extinguisher as I ran to the basement to pull the fuses.
We left the smoke to clear with the fuses cut out while we have dinner. I will go back and look it over, if only so I can disconnect the stove from power and replace the fuses (the refrigerator and the oven are on the same circuit.) I'm still not sure what happened. It seems like a surge, but the computer and other other delicate electronics didn't get fried, and the fuses look brand new, even on the "bad" circuit. We noticed some flickering in the refrigerator light before we saw the smoke from the stove, so we figure there's something going on in that circuit, but I can't figure out how a surge went through 20-amp fuses without breaking them. It makes me wonder whether some metal object from the junk drawer worked its way up into a switch or some other wiring.