The clip comes from the opening of “Flickering Entity,” a score cue associated with the supernatural horror film Insidious. The film was directed by James Wan, with music composed by Joseph Bishara, who also portrayed the Lipstick-Face Demon. Short excerpts from the movie’s abrasive score became useful in online horror edits because they create tension almost instantly. This particular opening remains effective for ghost reveals and jump-scare setups, especially when editors need a recognizable cinematic shock without using a longer musical passage.