Place it immediately after the failed scare, threat or boast, then follow it with a shocked reaction to underline that nothing happened, or open with a running threat before it for a sharper contrast.
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This is a very short Portuguese voice clip saying 'não faz nem efeito', delivered in a flat, unimpressed tone that sounds like a shrug in words. It lands as dry, dismissive humour, perfect for brushing off something that was supposed to impress, scare or hurt but did nothing at all.