Place it right after the smell is shown, then follow it with Eww Brother Eww for a stronger reaction, or open with Sudden Suspense before the reveal so the sniff lands as the punchline in a short gross-out edit.
Sobre este som
This is a short sniff sound effect, lasting about four seconds, built around a loud, exaggerated inhale as if someone has just caught a bad smell. It lands as a quick, grossed-out reaction, funny because the sniff says everything without a word, and it works best as an instant cue that something nearby stinks.