My father gave my mother a microwave for mother's day the year she was pregnant with me. By the time I was 32, my mother really, really wanted a new one, but my father is a huge tightwad and wouldn't replace it because it still worked. Well, let me rephrase the tightwad bit. He'll spend money on quality items, but only if the extra money means quality, not a brand name. Anyway, they were at a standoff. My mother decided to end the standoff by putting the lid of a green bean can into the green beans as she warmed them up. She did it on purpose, with the specific intent of blowing up the old microwave. It worked in spectacular fashion.
Oddly, it's been 5 years or so and she hasn't been happy with a microwave since then.