I Skype, you type

Try this. Call someone (preferably someone you know) on your Skype, switch your mic off so that you can hear them but they can't hear you, then when they pick up start typing everything they say. My sister just did to me quite by accident (well she was clearly taking the piss when she was parroting me) but we couldn't stop laughing, well she ha ha ha'd. It was a bit creepy to start with but amazing the way we adapted. It was bizarre talking to someone who then typed back a response like a computer, but we're easily amused where I'm from.