Mine was our CRT TV. I would rapidly push the power button on and off because I thought the picture coming and going looked cool but eventually it fell inside of the TV. I think I later stuck a magnet on the TV.
Not looking for Reddit answers like “My parent’s marriage”
I’m not sure how much my brother costs, but the three of us brothers were running across the top of monkey bars and jump kicking each other. I kicked my youngest brother off and he busted his head on the ground. It’s ~40 years later and he still has the scar on the back of his head.