Place it at the end of a fail sequence in your edit, right after the mistake is fully visible. Follow it with Nelson's Ha-Ha! for a second laugh, or precede it with the wrong answer game show sound when a quiz choice goes badly wrong.
關於此聲音
A three-second voice clip of Apu asking 'What were you thinking!' in a sharp, scolding tone. It lands as funny disbelief, the perfect verbal facepalm for a dumb mistake or reckless choice. The line comes from Apu Nahasapeemapetilon in The Simpsons.