Place it immediately after the patronising line in your edit, then follow it with Ba Dum Tss for a beat before cutting away. For a second version, use Mission Failed next instead, and save Oh Brother This Guy Stinks for a later moment when the same person returns.
關於此聲音
This is a spoken Polish phrase, 'Spieprzaj dziadu', delivered in a single sharp burst lasting about 1.4 seconds. It tells an older man to get lost in blunt, unmistakable terms. The effect is confrontational and darkly funny, with a dismissive edge that makes the rejection feel final.