Eu diria que isso se qualifica como Deixe a câmera funcionando
Sometimes a single shot goes on for a very, very long time. Though this is usually a bad thing when done to stretch the film and/or its budget, it can also be done deliberately for artistic reasons, such as showcasing particularly good-looking visuals, establishing more lifelike pacing, for the purposes of extending a joke, or increasing tension (because Nothing Is Scarier). It can also serve as a thematic device: For example, a director might illustrate the lonely and mundane life of a solo astronaut by showing him going about his daily routine, never speaking a word because there's nobody to talk to.
O link dá alguns exemplos de outros finais, mas poucos são cômicos:
Heat ends with a fifteen second shot of Lt. Hanna standing framed in the lights of Los Angeles International Airport holding Neil McCauley's hand as he dies.
The Graduate. How long are they sitting on that bus, slowly realizing they have no idea what they will do next, having burned all their bridges behind them? Nichols literally left the camera running without warning the actors.
Michael Clayton ends with an extended shot of the title character in the back of a cab, showing his facial expression as he wordlessly contemplates what he's just done.