Horror movies are, for the most part, built to make you uncomfortable. Whether that's through subjecting you to some particularly icky gore as bodies are turned into bonemeal, or through hidden political messaging lurking in the depths of your monster movies, feel-good scares are a bit of an oxymoron.
But there are some movies that go a step further in the name of horror. That take a tension-fulled, terrifying moment and stretch it out to unbearable lengths - creating scenes of insurmountable anxiety that will have you hiding behind your sofa lest the atmosphere crush you to death through the screen. And it's psychological horror that absolutely dominates this style for the most part, crawling right up into your head like a wayward beetle as your fight or flight response is pushed to breaking point.
Films that feel like an actualised panic attack are hard to pull off, but oh boy, did these horror movies use everything available to make the whole experience an unpleasant one. Read on, if you can bear it...
You can find a few other horror movies on our list of broader anxiety-inducing movie moments, too, just in case you're somehow not a quivering, sweaty wreck by the end of this one.