Place it at the start of a round sequence, just before the action peaks, then follow it with the bomb planted callout for a full round feel, or open with the enemy spotted callout before it to build the setup.
About this sound
This 13-second clip is the shouted Counter-Strike grenade warning 'Fire in the hole,' delivered in a brisk, high-alert radio voice. It feels tense and alarming, like a fight is about to break out any second. The line comes from Counter-Strike, where players use it to warn teammates that a grenade has just been thrown.