Place it immediately after the reveal or claim that catches the speaker out, then follow it with a reaction sound such as Bruh to close the exchange. Put an Oh My God Meme sound before it when the setup needs a bigger shock first, so this line becomes the answer to the hype.
About this sound
This is a short Czech voice line, lasting about 1.7 seconds, in which a speaker says 'no tak to jsem neviděl' — 'well, I haven't seen that.' It feels sheepish and disbelieving at once, like admitting you missed the one thing everyone else noticed, and it lands as a quick, deadpan denial when a claim sounds too strange to believe.