Taxying
The aircraft has just landed.
Female controller to Captain:"Turn right on taxiway A, then left on taxiway C".
Captain turns left on taxiway B, and comes nose to nose with another aircraft.
Controller: "What are you doing down there? Don't you know B from C? Do I have to come down there and teach you the alphabet? It'll take me an hour to straighten out this mess!"
Pause, then Captain: "Weren't we married once?"