Place this clip at the very start of a scare edit, before any build-up music begins. Follow it straight away with a scream meme sound for the payoff, or let a bruh sound effect undercut it when you want the scare to turn into a joke instead.
關於此聲音
This is Balloon Boy's single-word 'hi' from Five Nights at Freddy's 2, a childlike voice line lasting under a second. It feels cheerful at first, then immediately unsettling, because the sweet delivery clashes with the game's animatronic horror. That fake-friendly creepiness is why fans recognize it instantly.