If you plan on going camping or work at a construction site, check out this next video. In the tutorial, you find out how to perform the porta potty prank. Basically when someone has to go use the porta potty, you throw a rock down the air tube connected to the area where all the "stuff" is being held. Once the rock goes down the tube, it shoudl create a splash that should touch the victim. It's gross, but should result in some big laughs. So good luck, play it safe, and enjoY!