Originally Posted by 2MuchMark

They are OK. (No spoilers).

Human Centipede 1 plays out like a classic 80's horror movie. Girls lost in the woods meet a crazy doctor, etc. What the doctor makes the character goes through is a sick idea, but, it's not terribly gory or scary. It has some good suspense though and will make you sorry for eating that last slice of pizza.

Human Centipede 2 is completely different. It's about a guy who saw the first movie, and decides to make it real. This is a combination psychological thriller, lots of gore, and some truly sick and disturbing ideas. "Martin" is an amazing character. All the other characters are very strong and the acting is great.

You don't need to know anything about Human Centipede 1 really, but it helps a drop.

Human Centipede 3 features the same actors from 1 and 2, but in different roles. It plays as more of a parody and satire of the first movie, without referencing #2 at all. It has its share of gore and twisted ideas, but it not as effective as #2. It also "looks" low budget compared to the other two. The acting is fun to watch.