I left DH and DS#1 in charge of firing up the self-cleaning oven recently.
Came home to a house full of smoke and fire-extinguisher powder all over the kitchen. We are still finding some of the powder. Apparently some recently repaired wiring was repaired with some cheap tape, started smoking and DS#1 went into action.
That said, we have no idea what kind of disaster might have transpired if he was not there. Since the oven was nuked, I got a new range out of the deal.
Goes to prove that buying a new stove is more cost effective.