stabbing   brother sister relationship   bare chested male   deception   father daughter relationship   bathtub   dinner party   ambiguous ending   boyfriend girlfriend relationship   videotape   cult   imaginary friend   child in peril   laptop computer   mass murder   neck breaking   garage   evil child   scene after end credits   levitation   demon   hiding   witch   critically bashed   webcam   fourth part   old friend   demonic possession   lunatic   treehouse   apocalyptic   poltergeist   actress shares first name with character   adopted child   woman breaks man's neck   year 2011   twist at the end   death cult   evil cult   false pretense   premeditated murder   conspiracy   murder   suicide   knife   paranoia   husband wife relationship   tricycle   surprise ending   poisoned   sequel   mother daughter relationship   shooting   filmed killing   neighbor neighbor relationship   suspicion