* CompleteMonster: The Stranger. He stalks, terrifies and eventually murders young women just for the joy of it. And the children too.
* ItWasHisSled: The fact that TheCallsAreComingFromInsideTheHouse was originally a shocking twist. The [[TrailersAlwaysSpoil trailer for the remake]] completely spoils this, as well.
* ParanoiaFuel: These films basically play on the fear of a) being alone in someone else's house, and b) unusual noises inside said house.