Put it at the end of a confusing setup, right where the misunderstanding becomes obvious, then follow it with Woody Woodpecker Laugh to stretch the joke, or cut to Ai Que Burro Sound when the mistake belongs to one person in the scene.
About this sound
This 10-second clip pairs a Portuguese speaker saying “eu nao entendi nada” with a burst of laughter, the voice shifting from puzzled to amused in a single breath. It feels like catching yourself laughing at a conversation that made no sense, playful and a little teasing rather than annoyed. The mix of confusion and laughter makes the reaction land instantly, even for listeners who do not speak Portuguese.