The Human Centipede (First Sequence) (2009) on Netflix

Americans Lindsay and Jenny are on vacation traveling through Europe. In Germany, they meet a waiter who invites them to a party in a nightclub called Bunker. They rent a car, but they get lost on a lonely road in the woods. When they have a flat tire, they do not replace the tire and prefer to seek for help instead. They reach a house, where they are received by a psychopathic mad scientist named Joseph Heiter, who drugs them. When Lindsay and Jenny awake, they find that they are tied to a bed in a laboratory in the basement of the house. Sooner, Dr. Heiter brings a Japanese tourist named Katsuro and introduces himself as a former surgeon specialized in separating Siamese twins. Further, he details his insane project of creating a human centipede by joining three human beings through their mouths and anuses.