Put it right after the reveal shot and before the reaction close-up, keeping it between the two beats. Open with the Dramatic Dun Dun Dun Sound Effect to set up the moment, then let this clip answer it, and follow with the Vine Boom Sound Effect if the twist turns comic.
關於此聲音
This is a very short clip of several female voices gasping at the same instant, a quick collective intake of breath with no words. It gives a listener an immediate jolt of shared shock, making a reveal feel bigger and an awkward beat feel more exposed. That wordless reaction works across comedy, suspense and gaming because anyone can recognise the sound of a room reacting together.