The one where Pike does something extra, extra, extra daft. Mainwaring looks him straight in the eye and says "You stupid TWAT" CUT!
Or the scene where a new teenage girl has taken a room in Rising Damp. She catches Rigsby peeping on her while she's asleep and Rigsby has to strangle her to death to stop her going to the police - with hilarious consequences! Cut!!
Or how about the one where an increasingly desperate Frank Spencer makes a bungled attempt at an armed robbery with a shot gun in the local post office and an old lady accidentaly takes both barrels in the back of the head? Betty!! CUT!!