He stabbed another kid with a letter opener he made in shop class. We didn't make letter openers in shop class after that. u/Lord_Kaplooie

Kindergartener — long list of threatening behaviors (foster kid with every kind of past abuse) told me he was going to shoot himself and then come shoot me. I refrained from pointing out his lapse in logistics. u/Borderweaver

He kicked my friend in the rear end so hard it broke his tail bone. He literally broke my friend's booty. u/NoStorage2821

he sprayed another student with zippo fluid and was attempting to set the student on fire when he was tackled. u/Delicious-Sir-3841

The final straw was when he lit a cigarette in French class and refused to put it out. Smoked it all. He was 13. I see him every now and again and he’s a mess. u/david4460

Running through the cafeteria at lunch naked with a backpack on that he set on fire. u/Cflynn00

Russian exchange student in high school. Chased a squirrel, caught it, it bit him, so he swung it by the tail against a tree. He was expelled for having a detailed map of the school with locations where he wanted to place bombs and a list of students he wanted to kill and how he was going to do it. u/Ubermassive

Playing kickball in gym class kid kicked his shoe off and his bag of weed came flying out right to the teachers feet! u/benchdapark2990

Thought he was funny and decided to grab the SRO (student resource officers) gun. Our SRO also happened to be part of SWAT. He did this as we all left end of day, crowded hall. I remember this vividly over 20 years later. This was also post Columbine by like a month. Kid got slammed into a wall put in cuffs. Arrested and expelled immediately. u/delusionalinkedchic

Planned a food fight that turned into a riot with property damage and then fled from the police. u/beito14159

Tackled and restrained by coaches after he grabbed a bat from the storage room with the intention of beating his pregnant math teacher with it. u/SheZowRaisedByWolves

He just kept shitting his pants. There was nothing wrong with him. He just kept doing it. Same place, same time, everyday… right after recess when we lined up to go inside he’d just let loose… the fattest and wettest fart/shit you’d ever heard, and it would echo through the silent hallway for literally everyone in the grade to hear. At first we thought it was just embarrassing for him, but by the time week 2 came around, we were all convinced he was doing it intentionally. I have no explanation because he was kicked out after like 3 months of consistently doing it. u/TooYoungToBeThisOld1

Downloading porn on the school computers was the last straw, he even used his own login. u/Nkfloof

Peeing on a teacher who wouldn’t let him go to the bathroom. u/TheGhostofWalgreens

Walked out of English class to talk to another kid in the hall. The teacher was real lax so she didn't care he walked out to talk to this guy. Fight breaks out in the hall. Teacher runs out, other teachers come help break up the fight. One teacher asks the kid that walked out class why they were fighting and he said "He stole my weed." Kid who left class was selling and the kid in the hall tried to walk off without paying. Any other BS excuse would have just got him suspended. u/fz6brian

For spraying the fire extinguisher in the principals face after he called him short. u/Lady-Poizon

Baited a very mentally unwell homeless man into the school for the giggles, man had a knife and after being refused fries from the school cafeteria threw a tantrum on the tables. Nobody was hurt but the kid was expelled for threatening future safety. u/ImpossibleLoon

Put laxatives in a pregnant teachers coffee. She miscarried 2 days later. Fucker was 12. u/blueangels111

Guy grew up doing Muay Thai, boxing and wrestling. Forgot where he was during a wrestling match and threw a spinning back fist that knocked his opponent clean out. He was completely mortified once he realized what he did. Straight A student, star athlete, and genuinely good guy. The class president even addressed it and organized protests and walk outs until he was reinstated. Even the guy that got knocked out and his parents forgave him and supported us. He did get reinstated but wasn't allowed to wrestle or box anymore. Not sure what the coaches pulled to allow him to play football. He eventually quit football too his senior year and was never really the same. u/Sol-Blackguy

Happened in Kindergarten. There was a kid named Dexter who had severe anger issues. Every day a small group of kids would get certain "jobs" to do around the classroom, such as line leader, table cleaner, etc.. Dexter got the table cleaner position and he was absolutely livid since he wanted to be line leader. What started off as a screaming fit escalated into him throwing scissors around the class, biting the teachers hand, shattering a window with his flying scissors, breaking the tank that housed the class gerbils, and just trashing the entire classroom. The rest of the students had to evacuate the class while the teacher and principle attempted to restrain him. Security had to get involved. Never saw him again after that day. u/Blue_Phase