What's the most expensive thing you broke as a kid and what's the story behind it?
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"
Was going through some semi-justified teenage angst stuff back in the day and my laptop was having some small issue, so I smashed my laptop.
I'm not normally prone to anger - then or now, so that was particularly out of character for me. I also wasn't able to replace it for a long while, since I wasn't like, rich or anything like that.
Honestly though, I've never regretted it. Given the circumstances (tl;dr: poor upbringing, loneliness), I can totally see why someone would lash out like that eventually.