It can take no nourishment from what it ingests.It""s working on instinct - a deep dark primordial instinct." He described how he was performing Pavlovian conditioning experiments on the zombies to ""domesticate"" them and to find a cure for the apocalyptic plague and epidemic of undead swarming throughout the country: "It can be domesticated Sarah, don""t you see? It can be conditioned to behave the way we want it to behave.When Cassian balked, she suggested rescuing her father on Eadu and having him personally tell Alliance leaders about the weapon""s weakness." Foxy drove off in the Woody after taking him to the city limits.Riley realized the remainder of the city""s surviving inhabitants would be trapped by their own electric fencing ("What was built to keep people safe is gonna trap them inside") - whose power couldn""t be shut off.[Note: One of the film""s working titles wasNight of Anubis, but was then given the title ofNight of he Flesh Eaters.The film spawned clones with similar themes, such as Brian DePalma""sObsession (1976), and director Kenneth Branagh""sDead Again (1991).