Place it immediately after the fake claim is shown, as the closing beat of the edit, with the Fail Sound Meme just before it to underline the mistake. Follow it with the Bruh Meme Sound for a second reaction, then cut straight to the next scene without adding another reaction.
About this sound
A short Russian voice clip lasting about six seconds, opening with a brief scoffing laugh before the speaker delivers the line in a fast, dismissive tone. It feels sharply sarcastic and gleefully smug, like catching a friend believing something absurd. It circulates as a Russian internet reaction sound, reused whenever a prank, fake screenshot or exaggerated claim is plainly unbelievable.