My freshman year I was kicked off the football team. At a meagre 5'2 125 lbs I was the smallest player, a RB/SS, on the team yet the coach kicked me off the team for being what he described as a "bully:.

Six classmates were killed in car accidents my senior year, 10 more in the next few years following graduation.
Again in my senior year, there was a huge drug bust that expelled 50+ seniors, all for just smoking weed, which quite a number of students did, and I'm lucky I wasn't expelled. Big deal. The (then "local", as I don't live there anymore) police used an undercover officer to gain the trust of students, would hang out with them on campus (pretending to be taking courses) and even off campus. Sufficed to say, I already didn't like that school, but the mistrust they gave me, as well as the police.
Let's see. I was banned in my senior year from wearing a Brendan Shanahan Red Wings jersey an uncle bought for me (whenever family from Michigan bought me Red Wings stuff I was rather sentimental about it), which I had already worn for a couple years with no incident nor any warnings, because it had the number "14" and was red, and that was the number and colours of a Spanish speaking HIspanic gang, which obviously I as a tall white guy with blue-green eyes and brown hair who didn't ever speak Spanish (despite knowing it) would easily be confused for amirite?
I was also suspended the day before my graduation trip, yet again in senior year, for "verbal assault on a staff member" for telling a campus supervisor for overstepping her authority and telling me I wasn't going on the grad trip for horsing around with a friend of mine, picking him up, and throwing him into some nearby bushes, so I promised her my family would be up hers and the school's ass if I wasn't allowed to go over that. They suspended me 5 days and had the police interrogate me as if I threatened to kill her and made her out to be so gracious about the fact that she didn't sue me or get a restraining order over that. They didn't want to refund me the money I paid for the grad trip with so my mother took them to court and got it back plus fees. On the last day of school following graduation when I turned in my books, that same campus supervisor waved to me, I waved the finger then, and a number of times after graduation when driving by.
I guess you can say the worst thing to happen in high school for me was high school -- it certainly made me, from start to finish, encountering one ass after another on their staff, not have anything to do with school after school hours. I've also never encountered a populace of children and young advlts who's main aspirations were moving the hell out of that town. The continuation/remedial schools have a pretty high populace now because children and their parents want to avoid that high school.