Place it immediately after the surprising claim in your edit, then follow it with the Ceeday Huh sound to keep the questioning going, and close with Oh My God Wow for the bigger reaction.
O tym dźwięku
This is a very short Thai voice clip of someone saying 'เหรอ', the questioning word for 'really?', three times in quick succession. It gives a feeling of playful disbelief, as if the speaker has just heard something too strange to accept straight away. It works as a light, teasing challenge rather than a serious argument.