I hope you aren't the one on the wrong side of the joke today.
But, if you're looking to pull one over, then maybe you can find something here to help you.
From Martha Stewart's site
Puzzling Message
Confuse callers by leaving the following outgoing message on your answering machine: "Hello? [pause] Hello? [pause] Is anyone there? [pause] April Fools'!"
A mashed-potatoes-and-gravy "sundae" is a good gag for the afternoon, when everyone thinks the jokes are over.
