we all had a dumb moment and have been embarrassed about it

What's the dumbest thing you've ever done in School? Did you get caught by a teacher or was it just in class being embarrassed.
I had a boner in class.
That's not dumb that's biology

Dunno about dumb but I got suspended after I lost my temper having a bad day and I told one of the head teachers or something to fuck off to his face, then slammed the door, funny thing is I was dealing with hormones at the time as well and also was putting up with grief from other people in general, after that they all calmed down and left me alone when they realised they'd pissed me off and I got an early holiday!

I swear it was at my last school that I finally learned how to stand up to people who were being cunts to me.
Biology is dumb.