Place it at the exact reveal in your edit, right after the empty-box or empty-pocket shot, then follow the reaction with a Bruh Meme sound. A SpongeBob A Few Moments Later card works before it when the reveal needs a short time skip.
About this sound
This is a 3.7-second voice clip of a speaker delivering the Tagalog line 'Akala mo lang wala pero meron,' meaning you thought there was none but there is some. It lands as a smug, playful surprise, the kind of reveal that turns an empty-handed moment into a gotcha.