Place it after the threat appears and before the reaction beat, then follow it with the Metal Gear Solid alert for a second escalation or a funny laugh once the damage is done and the scene resets.
关于此声音
This clip is a song built to sound like the second warning for an ALEPH-level threat, the highest danger class in its setting. It carries an urgent, dread-filled feeling, like a facility alarm turning into music and signalling that containment has failed and a serious emergency is now underway for everyone nearby.