Place it immediately after the unbelievable claim, as the first reaction in the sequence, then follow it with Ceeday Huh for a second take. In a longer edit, open with Oh My God Wow to set up the moment, then let this clip answer it before the next scene begins.
Über diesen Sound
This 12-second clip is a spoken Portuguese reaction centred on the words 'como assim', asking how something could possibly be true. It lands as confused and disbelieving, the response you give when a claim does not add up, turning plain surprise into a funny, sceptical challenge.