Place it immediately after the failed claim as the reaction beat, then follow it with the Bruh Sound Effect for a second layer of disbelief, or the Game Show Buzzer Sound Effect to underline the wrong answer before moving on.
About this sound
This clip is a Russian spoken line, lasting just under nine seconds, delivered in a sharp, teasing voice that says someone claimed to know what they were doing. It feels sarcastic and exposing, like catching a fake expert mid-bluff. It circulates as a reaction meme for edits and chats where a confident claim is followed by an obvious mistake.