Place it immediately after the surprising line in your edit, then follow it with Oh My God Wow for a bigger reaction, or start with Ceeday Huh and let this clip answer the confusion.
关于此声音
This is a 1.8-second spoken clip of the phrase 'say that again,' delivered in a flowery, exaggerated voice that stretches each word into a small dramatic flourish. It feels cheeky and delighted, like a nudge to hear a surprising line one more time. Because it ends so quickly, the reaction stays light and the surprise does not wear out.