10 Dumbest Decisions In Slasher Horror Movies

10. Going Upstairs - Black Christmas

Along with John Carpenter's Halloween, 1974's Black Christmas is viewed as the movie that ushered in the slasher subgenre. In addition to also introducing the famed 'the calls are coming from inside the house' trope, Black Christmas likewise saw one of the most bone-headed decisions in horror history.

With a sorority house having been tormented by creepy phone calls - all while dead body after dead body is amassed - the final act of Black Christmas saw the jaw-dropping reveal that these sinister calls had actually been coming from inside the house.

Upon being informed of this by a frenzied Sgt Nash, Olivia Hussey's Jess freezes in panic, nervously takes in her surroundings, as the audience awaits for someone to emerge from the shadows. Then, though, Jess makes the utterly stupid call to head upstairs, shouting out to see if anyone is there.

Much to her terror, Jess soon finds the corpses of two of her best friends, is confronted by the killer, and ends up locking herself in the basement, where she promptly passes out.

Nearly as stupid as Jess' decision to head upstairs despite the police telling her not to(!), is the cops' logic upon finding Jess and the dead body of her boyfriend Peter in the basement.

Clearly looking to minimalise their paperwork, the police presume Peter was the killer, quietly put Jess to bed... as viewers are shown how the killer is, of course, still alive and in the house.