I have imaginary conversations with real people, dead people, fictional people. I do it when I'm alone and driving, which sometimes causes me to lose track of where I am going. I imagine I am being interviewed or on trial sometimes.

It's actually very helpful in rehearsing for real situations, preparing for whatever someone throws at you, practicing your responses.

But then, dontcha hate it when someone gives you a zinger and you only think of the perfect come back an hour later?