Place it right after the smelly reveal in your edit, then follow it with Wet Fart as the cause, and finish with What Da Dog Doin if a pet takes the blame for the smell.
關於此聲音
This short voice clip has the Postal Dude sniffing the air and asking what's causing the awful smell, delivered in a flat, disgusted tone that makes the complaint land harder. It feels grossed-out, sarcastic and instantly relatable whenever something stinks nearby. The line comes from the Postal games, where the Dude reacts to the world around him with blunt, deadpan disgust.