Has anyone ever made funny prank calls to anybody?

I've got several, here's a few of the best...

I phoned my school and said I was called Tom Ato and I needed to speak to the computer technician about a virus on the school computers.

I called again a few weeks later and said my name is Caeser Salad and I have seen UFOs flying over the school field at night.

And one I did about 30 minutes ago, I called this guy I really hate and I went by the name 'Simon Smith'. I said I worked for Rodale Ltd. and I had a order for a book called 'How to Tell your Friends you are a Homosexual' that we hadn't received a payment for. He, at first, denied it, then he went all quiet.

So, anyone got any funny prank phone call stories.