Put it at the exact cut where the reveal happens, after a short setup clip and before the reaction shot, then follow it with a Vine Boom Sound Effect for the joke that follows, or use a Dramatic Dun Dun Dun Sound Effect first to tease the twist and let this one close it.
關於此聲音
This three-second clip is one amplified low impact, a heavy low note that rises and then trails away into a rumble, with no voice or melody behind it. It feels tense and serious, turning an ordinary image into something suspicious or shocking, as if a hidden detail has just come into view.