After school detention, can't remember what for it was with the Chem teacher..dunno if it was specifically because of something I'd done in that lesson or he was just covering detention. All I remember is he disappeared after about a minute, said he'd be back..didn't come back so we left after a while.
In primary school I also had to write some letter of apology to this girl because I pushed her into a brick wall, but then she was bullying another girl. I was just scaring her so she'd lay off this other girl, to be fair it did work I never witnessed her pushing the other girl around at break times any more.
Only other thing I can think I've done which would have gotten me in trouble if the teacher saw was when I threw a pen at a guys head and the nib impaled his forehead..hung there for a few seconds..then the pen fell out. Felt kind of bad because he wasn't my prime target but he wasn't totally innocent. They were mates and everything, just one kept whispering "oi Joe.." and when I'd go "what?" he'd look confused and go "what? I didnt say your name..". Guy kept doing it throughout the lesson then the guy sitting next to him does it for the first time as well, so then I just grabbed a pen and threw it at them, would have rather it impaled the other guys head tbh.