Not a student anymore but this happened when I was 15/16. It had snowed so after a 15 minute break between classes I was cold. Class had not started yet so I sat on the ground with my back against the radiator to warm myself up after spending 15 minutes in the snow ( more kids were near the radiator but I was the only one sitting ). The teacher was a laid back guy and didn't say anything about it, but then the principal walked in for a moment to talk to the teacher and saw me. He told me to go outside the classroom where he told me to go home. Don't exactly remember what he said, this happened 17 years ago, but I remember asking if I could go back in class and thatI'd never do it again. Couldn't care less about the shitty class because it was economics but I just didn't feel like catching up some other day I could be home early, kust wanted this shit class to be over with. The principal send me home, on my home I kept thinking how fucking retarded this was and how it didn't make any sense. I never had to make up for the lost hour which I'm still happy for to this day, but I still don't get why I was send home for warming myself up.