Horror movie soundtracks sometimes include infrasound, which is sound below the range of human hearing. Even though we can’t hear it we can still feel it and infrasound has been shown to induce anxiety, heart palpitations, and shivering.
Stephen King was terrified as a child when he saw the movie Bambi, calling it the first horror movie he saw.
A lot of that weird creepy music in horror movies is performed on one unique instrument called a waterphone.
Horror director Eli Roth showed villagers in a remote native village deep in the Peruvian Amazon the controversial 1980 horror film “Cannibal Holocaust”. To show them what a movie was. The villagers thought it was a comedy and the funniest thing they’ve ever seen.