The answer, my friends: The music. It’s all in the scores of the music. Consider the music that always accompanies the most scary and intense scenes. It’s often inharmonius with shrill instruments and strong base. A great example is the music in the movie Jaws. I’ll bet you immediately thought of the theme song and you SHOULD have, because that is what is most frequently associated with the film. The same goes for movies like the Halloween and Friday the 13th series. They both have distinctive theme songs that send chills up your spine if you hear them.
To show you how RIDICULOUS scary scenes are without movies, check out the attached video from Psycho:
Love and light to all! Do some spooky things! It’s Halloween! ❤