4) The Human Centipede (2009)

The Human Centipede is a shocking body horror by Tom Six. It involves a deranged surgeon, Dr. Heiter, kidnapping three tourists and performing grotesque surgical procedures on them. He connects the mouths with the rear ends via surgery of three people, making a human centipede.
The bizarre premise and graphic depiction of body horror forces a film-watching audience to question its limits of acceptability. No matter how taboo it's been as a product, The Human Centipede has gathered a rather militant following and precipitated discussions on the limits of horror.
It has a strong focus on dehumanization, medical ethics, and the utter absurdity of extreme body modification.
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