Lol, here' mine: I pressed the fire alarm in one of our school's corridors. Students from our school normally do that but they stop it after just a second. I tried doing it but I wasn't able to pull the button and students and teachers slowly went out of their rooms to check what was happening while I was panicking, hahaha. Lol, it was a stupid prank gone wrong and to top it off, the fire alarm is near the principal's office! Good thing I wasn't punished and was just told to call the guard although the principal was annoyed. Haha, needless to say though, it was an embarrassing experience but the students forgot about it after a day or two. This happened when I was 13 years old and a first year high school student lmao.