This is a generic stock-style effect rather than a line from a film or game, and it circulates online mainly through soundboards and editing libraries where creators search for a ready-made scare. Its appeal comes from combining two familiar scare signals at once, a human scream and an animal-like roar, which makes it work across horror, comedy and reaction content without needing context. Because it is short, loud and instantly recognisable as danger, it keeps being reused for reveals, pranks and jump cuts in short-form video.