The Human Centipede (First Sequence) (2009) trivia:
Some scenes of the movie are so strong, some audience members walked out of the test screenings.
The inspiration for the film came from a joke director Tom Six made with friends about punishing a child molester by stitching his "mouth to the ass of a very fat truck driver".
Film critic Roger Ebert refused to give the film a star rating for his review (not to be confused with a zero star rating which he hands out to the very worst films he views), saying it doesn't matter how the film is perceived, "The film is what it is and occupies a world where he stars don't shine."
Tom Six contacted a real surgeon for the medical human centipede design, thereby granting the rights to the tagline "100% medically accurate".