VN AfterTaste

Wikipedia:

The Cheese Shop is a well-known sketch from Monty Python’s Flying Circus.
[…]
The idea for the sketch came after a day of shooting in Folkestone Harbour, where John Cleese threw up repeatedly. During the drive back, Graham Chapman said that Cleese should eat something and asked if he fancied anything; Cleese replied that he fancied a piece of cheese. Upon seeing a chemist’s shop, Cleese pondered whether they had cheese and they decided to write a skit on that idea. However, when they sat down the following day to write it, they found the original idea of someone asking for cheese in a chemist’s shop to be unrealistic and instead decided to write a sketch about someone who goes to a cheese shop that did not have a single piece of cheese.

Chapman then wrote the sketch with Cleese, who initially did not find the sketch humorous. Only after Chapman insisted it was funny, it was presented at a reading for the other Python members. At this reading, while others were equally unimpressed, Michael Palin laughed hysterically, eventually falling on the floor. The other Pythons laughed at the scene, and agreed on producing the sketch.

[Cheese Shop Sketch at YouTube]