Place it just after the reveal in the middle of the edit, then follow it with the Ceeday Huh sound for a second reaction before cutting to the Sad Violin sound to close the sequence on the failed outcome.
Über diesen Sound
This is a 2.7-second vocal clip centred on Masseo's drawn-out 'uuh', a single hesitant utterance with no other words or music behind it. It feels awkward, uncertain and slightly exasperated, like a pause that says more than a reply would. That makes it an easy shorthand for confusion, disbelief or a moment that leaves someone lost for words.