'Fire in the hole' began as a real military warning shouted before detonating explosives, and shooter games turned it into an iconic grenade callout, with Counter-Strike cementing it in gaming culture. The line's urgent, barked delivery made it a natural meme, ripped from gameplay and reused wherever something is about to blow up. Today creators drop it before prank explosions, rage clips and fail compilations, and the two-second warning has become shorthand for incoming chaos across edits, streams and reaction videos.