Place it right at the reveal, just as both people are caught on screen, then follow it with No No Wait Wait for a quick denial before the scene moves on. For a slower build, open with Sudden Suspense and let it build before this question arrives.
O tym dźwięku
This short spoken clip lasts about three seconds and delivers the line 'What the hell u 2 doing?' in a blunt, questioning voice. It lands with confused disbelief, as if the speaker has just caught someone mid-mischief and cannot quite believe what they are seeing. That mix of surprise and mock scolding makes it feel funny, awkward and instantly usable as a reaction.