I think someone should make a ‘Human Centipede’ parody called ‘The Human Minutely-And-Inconsequentially-Altered-Human’.
In this film, a human would be kidnapped and then, unbeknownst to them, a very minor and trivial thing would happen to them before they were returned, without their knowledge of what it was.
Say, one strand of hair being cut. Or maybe a fingernail nicely buffed. Or perhaps a gold star on the forehead?
The possibilities are endless, and THINK OF the number of sequels!
Not any dumber than HC 1-3.