There is no single documented source for this short 'faaaaa' clip, which is typical of sounds that circulate on user-made soundboards and short-form video. The yell works because it is generic enough to fit almost any shocked reaction, so creators have reused it across gaming videos, reaction edits, and meme compilations without needing the original context. Its two-second length makes it easy to drop into a timeline, loop for emphasis, or stack with other scream meme sounds, and that flexibility is why it keeps appearing long after its first uploads.