Put it right after the grab in your edit, then follow it with the Anime Ahh sound for the thief's reaction, and end the bit with the Womp Womp Fail sound when they walk away empty-handed.
关于此声音
This is a short, roughly three-second voice clip of someone shouting 'Give that back, loser!' in a sharp, bratty tone, with the emphasis landing hard on the demand. It feels petty, indignant and funny at once, like a playground argument turned into a punchline, and the sudden burst of attitude makes it land as a playful call-out rather than a real threat.