The Human Centipede III (Final Sequence) is just as repulsive, but far louder, and in color.

Tom Six's threequel races to the bottom with abandon, all while indulging in tired wink-wink self-consciousness that includes Six himself showing up to witness his movie monster made real (and to be slandered by Laser as "a poop-infatuated toddler").

Neither Scary nor eye-rollingly fun, The Human Centipede 3 (Final Sequence) is the dullest entry in an atrocious trilogy.

Six just wants to shock, though his imagination is so primitive that the effort is strained and a bit pathetic. Initially abrasive, the whole enterprise grows simply tedious well before the now-epically-scaled titular phenom is unveiled in the prison yard.

Tom Six has achieved the seemingly impossible: He's made a film even less watchable than "The Human Centipede II."