BA London to Rome, some years ago. Push back from stand. Italian lady runs down the aisle and starts hammering on the cockpit door, screaming in Italian that she wants to get off. It becomes apparent that the cabin crew don't speak much Italian. Some Italians get up and start 'helping' with the translation. Bedlam. The plane stops. Man with stripes on sleeve appears at the door. Door closes. Then the announcement:
'Ladies and Gentlemen. There will now follow a short delay while we try to establish why this lady does not wish to fly with the World's Favourite Airline'.
Downside: remote parking stand, bomb squad, two hour delay, got to FCO after the last train.