Undoubtedly Short Circuit.
See, most people think it's just a cutesy film about a sapient robot and a load of obscure film references...and that's why it's scary!
See, what you have to understand is that it was all a metaphor for (insert your conspiracy theory of choice) and every time you watch it, (insert your ex-Eastern Bloc country of choice) excutes a (insert your NATO country of choice) spy, who didn't know that they had been discovered but had been due to (insert your rant continuation of choice)
...and that's why the Grinch stole crimbo.