Parser IF fic which messes with the "you are in a maze of twisty little passages, all alike/different" trope with a running gag where you regularly run into "you are in a little maze of twisty passages, all alike" and they usually have exactly one room.
Also keep it going with different permutations. "... all alike." "... all different." "... all similar, but different", "... all alike ... wait no, there's subtle differences" etc.
The punchline is that you eventually find an actual full maze that goes "You are in a big maze of twisty passages, all different. For example, this area ..." and then gives each room in the maze a unique description.