Did You Play Humorous Tricks on Your Teachers?

I don't kick chairs anymore. But did you ever play any funny tricks on your teachers? Any humorous tricks? Well again, this is many years ago when we had the boards that you used to write on And they went around you could move them in a circle. There was a piece of metal across that you pulled down to move the board in a circle and we used to balance the board rubber. We balanced this dusty Eraser or board rubber right at the top of the board So that when the teacher pulled it down It fell on his head and the chalk went all over his or her jacket And we thought that was hilariousAnd did this teacher fall for it time and time again? Or