scary movies
Lead actor Maika Monroe and director David Robert Mitchell are set to return for part two of the cult classic.
In a HuffPost interview, producers discuss the film's real villain -- that nail on the stairs -- and tease a sequel.
Whatever you do, don't watch these in the dark.
A psychological horror thriller you'll want to watch through your fingers.
WHAT'S HAPPENING
Take your hands off of your eyes.
Suspenseful scenes hold our attention -- and stick in our minds.