The only thing that bugs me is
Where the heck did the first technician's body go? Was it just something left over from a scraped subplot or something or was it supposed to work into a scene that was cut or was it just a goof?
shareI think it's implied that the robots hid his body so that the second technician wouldn't be suspicious. Then, they killed him, too.
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We never really grow up, we only learn how to act in public.