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A horror short story by Clive Barker, later adapted into a Slasher Movie by RyuheiKitamura. In it, Leon Kauffman, a photographer, is attempting to find the "real" New York City. He begins to delve into the city's inner "darkness", and while there, discovers a monstrous serial killer roaming the subways — and then he meets his boss.
The Midnight Meat Train provides examples of
Adaptation Expansion: The short story takes place over a very short period of time: Leon complains about the city in narration, has his coffee spilled in a diner, reads about the "Subway Slasher", and the next day is trapped in a subway car with him — cue climax. The movie pads out the story to build suspense and give Leon more character development.
An Aesop: Debatable, but it certainly seems to be influenced by Barker's vegetarianism, and dislike for New York City. You can easily enjoy it without caring about either of these things, though.
Body Horror: Mahogany. He cuts weird, fleshy nodules that look like barnacles off of himself and keeps them in jars filled with some kind of fluid. It's implied that this is some kind of deterioration from being The Butcher. From the number of jars and the almost routine way he does it without feeling any pain, he's been doing it for a while.
Brick Joke: The pre-credits scene in the film shows a subway murder by a man in a suit that we assume is Mahogany. After what happens to Leon, just before the end of the movie, we see it again, and realize that it is, of course, Leon, not Mahogany.
The Cameo: The Japanese supermodel who Leon rescues from some thugs and Mahogany kills is named NorA, and was in Kitamura's previous (and final one made in Japan, as of this writing) movie, LoveDeath.
Death Glare: Leon at the art gallery staring at the picture of Mahogany in the meat-packing plant, and then the two of them at each other just before the final fight scene.
Gorn: Oh hell yes. The murders, naturally, but also a long and detailed scene showing Mahogany stripping the corpses. That is, cutting off their hair, removing their teeth, eyes, and nails, and hanging them on hooks. Remember that this is also, essentially, what actual butchers do to actual dead animals.