Whats the craziest thing your teacher told you do to in class?

I told my students to stand up on their desks after they answered a question correctly. Why? I have no idea.... I just thought it would be funny when my supervisor comes walking by to see 10 students standing on their desks. Well I wasn't smart enough to have a reason for them standing on their desks before the lesson started, which would make me look really stupid in front of the students (what kind of crazy english teacher is this)... but I was lucky, I brought some flashcards, so then the students standing on the desks had a flashcard competition, the first one to give the right english answer got to sit down and so on. Now that was random but It really got the students into it. Just some tips for those teachers reading this and you can spare "You are da Man" and "Where are geniuses like you here in Canada" comments until I come back, I get enough of those here.