Place it right after the offending line in an edit, then follow it with Oh My God Wow to widen the reaction before cutting back to the speaker. For a second option, put Damn just before it so the two reactions build toward the same punch.
O tym dźwięku
This is a 2.6-second vocal reaction built around a repeated 'aua oh oh' exclamation, delivered in a strained, wincing voice that sounds like someone recoiling from a bad idea. It lands as funny and awkward at once, giving a small moment of mock pain that makes a clumsy comment feel even worse.