This squeal is associated with Half-Life 2, the Valve first-person shooter released in 2004, and is shared online as a short extract from its game audio. Like many Half-Life sound effects, it has been reused far beyond its original gameplay context, appearing in edits, memes and reaction clips where a sudden high-pitched noise fits the moment. Its brevity and instantly recognisable game feel have kept it useful for creators who want a quick scare or comic sting without a long musical cue.