Place this clip right at the reveal in your edit, before any spoken reaction, then follow it with the eww brother eww button for a second voice chiming in. Keep it as the opening beat and let the follow-up carry the rest of the sequence.
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Esse Cheiro is a 5-second Portuguese voice clip of someone reacting out loud with a drawn-out, suspicious delivery, as if they have just caught an unpleasant smell. It feels funny and grossed-out at once, and the drawn-out delivery turns a simple complaint into a quick sniff-and-judge reaction.