The hippie replied: “sweet!”.
So, Tuesday night comes and the hippie has a ghost costume, 8:30 comes and here comes the nun. The hippie pops out and says: “I am the ghost of a man buried here, and I command you to have sex with me!”
The nun: “Well… ok, but I have a virgins aspect so it has to be oral”
So the nun and the hippie have oral sex and the hippie runs away and says: “Ha, ha I was actually the hippie” and the nun replied: “Ha, ha I’m actually the bus driver!”