Place this clip right after the reveal in your edit, preceded by the dun dun dun sound to build the moment, then follow it with the galaxy brain meme sound when the new understanding clicks and the scene moves on.
關於此聲音
This is a short spoken clip of a voice saying 'what I never knew that' over about four seconds, delivered like a stunned reaction to new information. It gives listeners that sudden, slightly embarrassed feeling of realizing something obvious was missed all along, mixing surprise with dry disbelief in a single line that lands instantly.