My best friend at the time pulled the school fire alarm. Fire trucks showed up and everything, and it was a false alarm. He blamed it on me, saying that I dared him to do it and he caved in because "best friends are supposed to do what their friends ask." We both got in ton of trouble, and it took me a long time to live it down. I asked him why did he really pull the alarm, and he said the sign said "pull" and he was curious to see what would happen if you push the lever instead. He dragged my name in to somehow deflect the blame off of him.
My parents and teachers never believed my story. That was over 20 years ago, and I'm still salty over it. Fucking asshole.