This sound is best understood as a generic creepy whisper effect rather than a quote tied to a specific character or scene. Short whisper layers like this became common in meme edits, horror clips and suspenseful reaction videos across short-form platforms, where creators need an instant signal for dread or paranoia. Its lasting appeal comes from how quickly it changes the mood of a clip. It is often used in the same editing space as the dramatic dun dun dunnnnnnnn cue for sudden tension.