By using the clear film to cover a toilet a prankster can use a prank victim’s own urine against them. Notice the ease of set up in the featured toilet prank video. The simplicity of this prank is what makes it a classic. Notice the ease of set up in the featured toilet prank video. Since almost every household contains both a toilet and plastic wrap this prank is a constant threat to frat boys and teens everywhere. So next time you decide that it’s time to drain the weasel check first because there could be a crystal clear surprise waiting for you.