When I was very young, my family and I went to the Science Museum (at the old location in St. Paul). There was an exhibit there that had two mechanical hands in a glass tank that you could control by holding levers on the outside of the tank. My sister and brother grabbed them first and spent their time doing positive things like making pyramids and towers out of the foam blocks in the glass tank.
However, when I got a chance to use them, I grabbed them both and pretended they were two dinosaurs attacking each other. The two mechanical hands (and all their gears, pulleys, and cables) managed to get stuck together and no amount of dinosaur head shaking could pry them apart. It took me about 5 seconds of unsupervised time to break thousands of dollars of equipment.
For many years after, whenever I was at the Science Museum, I would point at the glass barrier now separating the two mechanical hands and say "I'm the reason for that!".
Today, I break software for a living. Apparently I'm good at breaking shit.