Any random public bathroom in anytown USA. Release bugs or mice or any other critter, real or fake, and see what happens as people are using the john or urinal when the critter (s) runs past their feet! No one should really get hurt with this prank other than maybe making a massive mess or a random heart attack Idont have a picture of this actually happening so I present you my doggie. He says "WUZ UP"
Start your career in Graphic Design with the WonderHowTo's Beginners’s Guide to Photoshop Course