Put it at the turning point of a fail or stealth sequence, just as the mistake becomes clear, then follow it with Metal Gear Alert for the danger and Law and Order Dun Dun for the verdict, so the sequence moves from warning to consequence to judgement.
關於此聲音
This short clip is a spoken warning that something is wrong and the speaker should turn back, delivered in a hurried, alarmed tone across just over two seconds. It lands as a comic moment of dawning trouble, the realisation that a bad choice is already made and retreat is the only sensible move. The plain delivery makes the panic feel immediate and easy to picture.