Place it at the exact beat where the reveal lands in your edit, then follow the stunned pause with a bruh soundboard button for the letdown or stack it before an oh my god meme sound button to escalate the reaction chain.
About this sound
This clip is a short 1.2-second voice line of SpongeBob shouting 'You what?!' in a high, incredulous tone. It delivers instant disbelief and comic shock, the feeling of hearing something so unexpected you have to make someone repeat it. The line comes from SpongeBob SquarePants, the animated series where his exaggerated reactions became widely used as memes.