An United Airlines pilot relates this..

 "The German controllers at Frankfurt Airport are infamous for being a short-tempered lot," the pilot notes. "So it was with some amusement that [a United 747] listened to the following exchange between Frankfurt ground control and the pilot of a British Airways 747 (call sign Speedbird 206)."

 Speedbird: "Good morning Frankfurt, Speedbird 206, clear of the active [runway]."

 Ground: "Guten morgen, taxi to your gate." The BA 747 pulls onto the main taxiway and stops.

 Ground (brusquely): "Speedbird, do you not know where you are going?"

 Speedbird: "Stand by, ground, I'm looking up the gate location now."

 Ground (impatient): "Speedbird 206, have you never been to Frankfurt  before?"

 Speedbird (coolly): "Yes, several times in 1944, but I didn't stop."