This isn’t a prank, but it’s funny:
In the middle of the school year, my class got a new English teacher. Since she wasn’t in the classroom yet at the beginning of the period, we weren’t in our seats and didn’t notice her arrival. Suddenly, we heard a loud BANG!, and then another. We turned and saw a lady throwing the teacher’s chair on the floor! Apparently, this was the only method she knew for getting our attention.
The door opened, and the principal poked his head in and asked, “Is everyone OK?”
One girl answered, “Most of us are!”