Just saw this again for the first time in ages.
Kevin & Perry: "Wet My Pants"
https://www.youtube.com/watch?v=55ZXoSxSmdIThat's how a sketch should be done. A solid minute and a half of pure comedy, absolutely zero fat on it, perfect delivery. It doesn't rely on any prior knowledge or understanding - you immediately understand everything you need to know about the situation, the characters and their dynamic. Stewart Lee may find ways to make repetition funny over the course of half an hour, but the simple repetition of the phrase "wet my pants" becomes hysterical by the end of this short 90 seconds. No idea how the auntie managed to keep a straight face, but the fact that Kathy Bates looks as though she's genuinely losing her shit makes it all the better.