Backstory first, then I'll tell you what the son of a bitch did at my house.
In 7th grade, a new kid moved to town and took to my group of friends like a charm. Eventually, we had a first sleepover at his place and he wanted to showboat a little bit. As kids do. There were a ton of us. Our normal sleepover crew was 5-6 core dudes, and the new kid had like 15 guys over.
Well, when people started to fall asleep, the new kid decided to pull out the 'shaving cream and feather' prank. This was 2002, and there were a few guys there who were on that 'Anarchist Cookbook' phase. Some kids just wanna watch the world burn and all that.
Well, despite hesitations from most of the guys there, those few followed through with it. And I was one of two victims. I woke up first, and my face, chest, and hair were slathered with shaving cream. I wasn't fuckin okay with it, to put it lightly. So I woke the other guy they were tickling up, and he bolted like he had PTSD. We were in a garden-level bonus room, and the bathroom was up a half flight of stairs. He shot up to the bathroom, hands covered in shaving cream, and left a trail of it all over the walls, handrail, bathroom mirror, sink, and carpet. The poor dude didn't even properly wake up until he was halfway through washing that shit off of his face.
It was just an awkward fuckin not fun situation all around. So we didn't have anymore sleepovers over there. Even the kids that were down at first ended up feeling like, "Yeah, you know.. embarrassing my friends like that to impress the new kid wasn't a good idea."
Fast forward a bit, the air had kinda cleared, and one way or another the new kid ends up with a couple buddies and me at my house for dinner. We all were getting ready to get our plates and such, and noticed he wasn't with us. I went back to my room and he was pouring Drano in my fish tank. He was pouring Drano. Into my fish tank.
In hindsight, I'm not sure how my mom kept her cool and didn't kill him, but she ripped him a new one, made him go stand in the middle of the yard with his hands on his head, and called his parents with a sense of urgency and Irish fury.
I'm sure you're wondering out of morbid curiosity, what happened when my fish were poisoned by Drano? Well, they started swimming upside down. Then they started swimming upside down and backward. Then they started diveboming into the tank rocks, and eating them while flopping across them. Then they started torpedoing out of the water and most of them died, in one way or another, from the impact with the lid of the tank.
TL;DR: The new kid poured Drano in my fish tank.