The vast majority of people with mental retardation have IQ levels of 55 to 69 and are considered mildly retarded. Mildly retarded children often go undiagnosed until they are well into their school years. They are often slower to walk, talk, and feed themselves than most other children.
When Tom Six began creating the Human Centipede sequels, he envisioned a trilogy that works as a movie centipede. Each sequel opens with the ending of the previous film, as the events of that film influence said sequel.
Image: e_monk. The House Centipede originated in the Mediterranean but they have managed to somehow get themselves all over the world. Many still live outdoors but, much like silverfish, they find the warmth of human abodes make for a wonderful habitat, especially when it starts to get cold out.