"Fire in the hole" is a well-known radio voice line from Counter-Strike, used to warn teammates that a grenade has been thrown. It became one of the most recognizable sounds in competitive shooters and spread far beyond the game through montages, frag movies, and meme edits. Its staying power comes from how instantly it communicates danger and timing. Counter-Strike fans also pair it with other classic callouts like bomb has been planted or enemy spotted to recreate the feel of a tense round.