The best April fools prank I ever got up to was when I was nine and I loaded up a few cigarettes in my dad's pack cigarette loads. He happened to pull out one of the loaded cigarettes while we were driving down the street with me next to him. I had pushed the things so far down into the cigarette that he had to smoke most of it before it blew. Ashes went everywhere and he almost crashed the car. I spent the next week grounded. It was worth it.