What's the most significant "you just fucked with the wrong person" moment you've witnessed or experienced?

I was in junior high (middle school) and there was this one goofy kid we all referred to as "Dancin' Danny" because he'd do this silly dancing business (like moonwalking, spinning around, grabbing his crotch, doing the Running Man and Funky Chicken and whatnot) whenever the other kids would egg him on. You all know the kid I'm talking about-- everyone had some trainwreck like this at their school. Anyway, Dancin' Danny was a grade or two younger than me and clearly had some sort of emotional/ mental/ developmental disability; kids were never really explicitly making fun of him, but Dancin' Danny was clearly kind of everyone's little sideshow-- even the teachers. Kids got a kick out of him; and being a little slow, Dancin' Danny was none-the-wiser that they weren't really his friends. But Dancin' Danny was always smiling. Always. Anyway, and then there was this one kid, 'Ian Ziering.' My buddies and I referred to him as 'Ian Ziering' because much like the Ian Ziering of Beverly Hills 90210 fame, this kid had a pubish mop of blonde hair atop his head. And he was kind of a dick (I can't speak to the real Ian Ziering's dickishness; only his hair). One day, for whatever reason, Ian Ziering went up to Dancin' Danny and told him that Danny's "mom actually killed herself because [he] was such a retard." The smile on Danny's face melted away and with his head down and shoulders slouched he walked off. I'll never forget it. He didn't cry and he didn't get angry. He just put his head down and walked away. Back it up a few years earlier to the time I once met Danny's mom. She was bald with pale skin and sunken eyes. I was with my mom and she was dropping off meals for hospice care. Danny's mom was about to die of cancer. Fast forward a few years. Danny and I were never friends and I doubt he even knew who I was, but what I just saw happen enraged me. I told my best friend what I was going to do. Like any best friend and with no questions asked, we would deliver Ian Ziering his day of reckoning. The next day we followed Ian Ziering home from school and at some point along the way we beat the shit out of that kid. We then duct taped him to a sign post, dropped his pants to his ankles, and told him that if he ever said something like that to anyone again, then we would destroy him. End of story.

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