The concept of "The Uncanny Valley" -- the theory that as artificial humans get closer and closer to looking real, they get creepier and more unsettling -- gets a lot of debate amongst movie and robot fans alike. Some say that it's just an unscientific speculation and that there's nothing to back it up. Others are too busy clawing their eyes out while watching The Polar Express.

Either way, there's no denying that some movie "humans," when rendered in CG or by puppets,robots, or other special effects, often end up being too disturbing to completely enjoy without constantly saying to yourself, "There's something on the screen right now that I don't really want to look at." And unfortunately, one creepy non-human can ruin a perfectly good film, let alone some Christmas drivel about a flying train filled with multiple CGI Tom Hankses. Care to see?

Read more of 7 Films That Got Stuck In The Uncanny Valley.