Let's have a little fun and share some pranks we might have pulled as a kid or an adult. Here is mine:

We used to go camping a lot when I was young. My sister and I got those little white popper firecracker things...you know what I am talking about? You throw them to the ground and they crack/pop loudly.I think they are called cracker snaps. Anyway, we would go to the showers/bathrooms at the campground and stick them under the toilet seats. Then we would go outside and wait for someone to go in and use the toilet. Someone would sit on it and it would POP and they would shriek. It really was hilarious!