What happened in school that still pisses you off when you think about it today?

This doesn't really piss me off, but I still wish I would've handled it differently.

When I was a senior in high school, I had two study halls per day, both in the cafeteria. Maybe 40 kids in each study hall. During the study hall, you could have your hall passed signed to go to the library, which I liked to do because I could play games on the library computers. But only 5 kids per study hall were allowed to go. There was no system, just a mad rush to the table in the cafeteria where the study hall teacher sat. First come first serve. One day I wasn't one of the lucky 5, so I went back and sat at my table with my head down to try to take a nap.

As mentioned, SH was in the cafeteria, which was large, so we could spread out, one kid per table. I sat toward the back corner, with only one person sitting behind me, several tables back. So like 20 minutes goes by, its totally silent, and for some reason I pick my head up and look at the one kid sitting behind me. And there he was, dick and balls flopped out in the open, furiously beating off. He had one leg up on a chair, with another chair positioned in front of him so that passersby couldn't see what he was up to. But from my vantage point, I got a real good look at what was going on. He saw me, we made eye contact, and he just gave me the "Yea, so?" look. I froze, no idea what to do. Do I stand up and yell, in front of everyone, "Hey teach, this kid's pounding off back here!." Do I wait and quietly tell a teacher or principal after class? I really didn't want to have to sit in the principal's office and describe this scene to a group of administrators. So inn that instant, I don't know exactly why, but I decided to just put my head back down and do nothing. When I told my friends about it, no one believed me. Thought I made the whole thing up, and teased me for trying to make up dumb stories just to be funnt. And I guess that's the part that pisses me off. I didn't make it up, guys. I SAW CHRIS P POUNDING HIS HOG IN STUDY HALL.

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