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.
For The Tingler, it was a buzzer in the seat called Percepto, which would be a shock to anyone watching the movie. The movie itself was a rather uneven but original idea, with Vincent Price playing a borderline doctor who discovers the very roots of human fear. It's entertaining, but has some big flaws. Dr.