Place it immediately after the unbelievable claim in a reaction edit, then follow it with a shocked reaction for the double take and an awkward laugh to close the beat.
About this sound
This short voice clip delivers the line 'Are you kidding me, happy?' in a sharp, incredulous tone, as if the speaker has just heard something unbelievable and cannot quite accept it. The delivery lands as playful disbelief rather than anger, mixing sarcasm with surprise in a way that makes a doubtful reaction feel instantly recognisable and funny.