I know, an April Fool's thread that isn't a prank. The mind boggles.
Anyway, we're a pretty ridiculous bunch on here, so I wonder, what's the best April Fool's joke you ever pulled on someone?
Mine was in my freshman year of high school. My friends and I had been saving the food coloring packets from the Lunchables promotion at the time. They were colored powders that would change to another color when wet. Mostly, we had the orange packets that turned the pizza sauce green. So when my lit teacher stepped out of the room, I went up to his desk and put one of the packets into his coffee. He didn't notice for quite a while, though he did make a comment that it tasted like all the sugar settled to the bottom. When he eventually did notice that his coffee was green, he freaked out and got rid of it. Needless to say, he wasn't very energetic that day.