Place it right after the vague location claim in your edit, then follow it with Awkward Crickets while the other person hesitates, so the unanswered question becomes the joke. If the claim turns out to be false, close with a sharp impact sound instead of answering it yourself.
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This is an 11-second Italian voice clip of Giuseppe Cruciani asking 'Ma in quale città?' in a blunt, incredulous tone as he presses for a precise place. It feels confrontational and comic at once, turning a simple geography question into a challenge that sounds impatient and disbelieving. The line comes from the Italian radio show La Zanzara.