Back in high school, my band director and I got the majority of the band with a prank on April Fool's. It was probably the most fun I'd seen a teacher at that school have. Basically, I just kept ******* up the same notes in a solo six or seven times, and he got increasingly frustrated (it was a real easy part). Eventually he snapped his baton and stormed out of the room. Right around the time everyone was starting to go "what the **** was that" he came back in, tossed me a nerf sword, and we fought. It was real cheesy, but times like that made high school worth attending.