[2] A man (Graham Chapman) and his wife (Carol Cleveland) are enjoying a night out at an expensive French restaurant.
Gilberto arrives, demands that the entire washing-up staff be fired, tells Gaston to report this news to the manager immediately, and recoils in disgust at the fork.
The manager (Eric Idle) arrives, tells Gilberto to relax, then sits down at the table and apologizes "humbly, deeply, and sincerely" for the dirty fork.
Mungo the cook (John Cleese) enters, berating the couple for criticizing such a vulnerable man, and swings his cleaver onto their table.
There's no audience and the actors do not boo when Chapman delivers the "punchline" which was changed slightly to "Lucky I didn't tell them about the dirty knife".
The Monty Python troupe had decided from the start that they were going to throw away punchlines, and this was a play on the shows that would use corny lines like the dirty knife.