Gremlins

What starts out as cute, turns ugly. In Gremlins, a boy gets a new pet, but forgets 3 important rules. Billy's pet Mogwai must never get wet, needs to be kept away from bright light and never, ever can be fed after midnight. Even if he begs and pleads, Billy must not feed him. Chaos ensues after Billy doesn't obey these rules, and carnage is left in the Mogwai's trail.
This Post Belongs To Best Christmas Horror Movies Ever