In Hurtworld, C4 is an explosive used by players to break into defended bases, so its detonation sound has become shorthand for a raid going off. The clip captures that in-game moment in just a few seconds, which is why it circulates on soundboards and in short gaming edits rather than as a standalone meme. Creators reuse it for the same reason they reach for other explosive cues, like the moment a bomb has been planted, because a loud blast instantly tells viewers that a plan has reached its destructive end.