Place it at the end of a failed attempt, just after the mistake lands, then follow it with sad violin for mock sympathy or cut to Nelson's ha-ha when friends are teasing the loser. It also works after a wrong answer gameshow sting when a quiz guess collapses.
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This one-second clip catches JonTron blurting out “I give up!” in a flat, defeated voice, the words tumbling out as if he has run out of patience mid-sentence. It feels instantly exasperated and funny, the sound of someone abandoning a hopeless task rather than arguing about it any longer, and it works because that resignation is so recognisable.