Bad Phone Connection

Pick one friend that you are going to abuse. Every time you call them at home, pretend that you cannot hear them when they speak.

"Hello? Hello?" *click*

Everytime they call you, do the exact same thing.

You can always add in a few lines such as, "I don't know who you are, but this isn't a funny joke."

If you see them on the street, act suprised and relieved.

"Oh that's YOU calling me. Here I thought it was a crank caller!"

Usually they will blabber out some apology and all the time you can smile to yourself knowing you are really pulling one over on them.