Film 4: The Human Centipede (2009)

Well this is an intriguing one. A deluded scientist who despises humans embarks on a horrific quest to create a human mutilation of 3 humans, of which the digestive system is how they are connected.
Without much prior reading, I was expecting something more gory, with the consequences of this joining system being mor concentrated on. However, it is less about the gore, and more about the sick and twisted concept and how it develops. Dieter Laser, who plays the creepy doctor, pulls off the character perfectly, and really does make the film as horrific as it entails.
The concept is so convincing, it makes me wonder whether some 'real' twisted person out there might try and actually give this a go. Let's hope not.

Film 1: Cannibal Holocaust (1980)

With a name like this, there was no way we weren't going to watch this. The opening credits, and scene made us wonder what we were watching. We were laughing, it seemed ridiculous, but then we saw an awfully real depiction of a coatimundi being knifed for food, and soon after a scene which showed a ritualistic slaughtering of a woman in the mud, and our thoughts began to change. The film went on to show a host of controversial material; murder, nudity, real sex scenes, rape, torture, cannibalistic acts, more real animal killings, child porn, the castration of a real penis, clips from real snuff films and such other brutal obscenities. The plot revolves around an anthropologist who goes to the Amazon in search of 4 people who are making a documentary on cannibalism in the Amazon. The film then switches between this, the documentary that those 4 people made, and to the later date when the anthropologist is back at home discussing the events.
It is the way in which you never quite know what is real and what isn't that impressed us most. It is terribly gory, disgusting, inhumane, but at the same time it is filmed in such a way that it all seems like a documentary, it all seems real. No wonder is was banned in 50 countries.
Another incredible fact: 3 of the cast signed prior contracts to disappear for a year after the film was made in order to make it seem entirely legitimate. This lead to the arrest of the director on suspicion of murder.
In summary, it is one of the best films I have ever seen, in terms of its impact and realism. Even if it is just curiosity that comes over you, everyone should definately check out this film.
For more trivia (there are some real gems), follow this link.