The fast zombie first appeared as an enemy in Half-Life 2, where its speed and erratic screams set it apart from slower zombies in the game. Players remembered the sound because it signalled a chase was about to start, not just a distant threat. As gameplay clips and horror edits spread online, the audio was lifted into short soundboards and reused far beyond the original game. Today it still works as a jumpscare scream for creators who want instant panic without explaining the reference.