To have your friends to go wait in their garage or drive way. Then you go some were in the house and pull a quicky, and bust a nut either on the floor, or a piece of furniture. Then say to the household owner or guest that "i bet you can't find it." And try to get them to unknowingly step in or accidently touch the jizz.
Dude, i totally got Johnny with that game of Nut & Go Seek!