Place it at the very start of an underground sequence to establish the location before any action begins, then let a quiet moment follow before a sudden reveal. Pair it with Scream Meme Sound for the moment something appears, and follow that with Bruh Sound Effect for a deadpan reaction once the scare has passed.
About this sound
This cave ambience clip lasts about three and a half seconds and fills that time with a cavernous wash that places the listener inside a space far below the surface. The feeling is lonely and uneasy, as if you have wandered away from daylight into somewhere forgotten and still. It creates a quiet sense of dread without any voice, music or sudden noise, and the emptiness itself does the work.