I wonder what people's opinions are on the funniest scenes in sitcoms. I suppose the obvious example is in Fawlty Towers with the Germans and Basil. However, personally, I've always loved the Bernard Cribbins episode where Basil thinks he's a hotel inspector, and when he finds out he isn't, he physically assaults him in the restuaraunt.
Any other great scenes that stand alone as just brilliant comedy set pieces?