You were a quiet kid, and everyone knew that, so he was surprised to see you in the school nursing room and was told that you got into a fight, which led you to have a compass circle tool blade thingy (how tf do you call it in English..) stabbed in your upper arm.

He carefully removed it and cleaned the wound before putting a bigger bandage on it. Then he looked at you. “How did this even happen? Do you want to report it to the principal? I can do it if you want to.”