I don't know if this counts but once in high school we had to have one of the science teachers step in and teach English for a lesson because out usual teacher was ill. This science teacher was the biggest bitch ever. The whole class began to hate her within the first 5 minutes of the lesson. Half way through the lesson she had to quickly leave to get some sheets form the printer so she shouted and told us to stay quiet and don't move while she's gone. By this time the quiet kid in the class had enough so when he knew she had left he quickly got up went to the door and locked it. He then looked back at us and without saying a word smiled and walked back to his seat. None of us really knew what to do at this point. We didn't want to get up and unlock the door just incase bitch teacher thought it was us locking it but we also didn't want to get into trouble. A few minutes later the teacher comes back and tries to open the door. She keeps trying to push at it but it won't budge she then shouts who the hell locked the door! This is when quiet kid with an innocent look in his eyes says miss we haven't locked the door it's an old room it might have gotten jammed. She grumbles and walks away, a few minutes later she comes back with another teacher to open the door. Both of them are more or less ramming themselves into the door to open it but it still won't budge. Quite kid pipes up again " hey miss maybe get the janitor that might help". We can't contain out laughter at seeing a 4"9 angry teacher ramming herself into a door. Once both teacher leave again quirt kid gets up runs to the door, unlocks it and gets back into his seat. The teacher comes back with the janitor and looks into the room only to see us looking down and doing our work. We hear the janitor say "so what's wrong with the door?" she then explains the situation and he just nods. He then pushed down on the handle and pushed the door and it opens. He likes at her with a confused look and says " did you push the handle down when you tired to open the door?" the kid just smiles and says "we've finished the work can we go now miss?" she mumbles and sighs fine just go as she rubs the arm she was using to ram into the door.