These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The final shot of the film, arguably: Michael Palin (in drag, of course) has just finished up a rambling and bizarre speech about film censorship, when the Flying Circus theme music begins to play, loud and clear. The film suddenly cuts to the beginning of a Flying Circus episode playing on a TV set, pulling away from the camera to reveal that it's floating around in space. It then flies off into space, and the end credits roll. An appropriate way to end Monty Python itself, and more than a little moving if you're a big Python fan.
Seeing Graham Chapman in the Colonel getup one last time.