Place it at the end of the setup line, right before the reaction shot, then follow it with a bruh sound for the stunned reaction and an emotional damage sound if the target needs a second hit to close the scene.
About this sound
This clip is a whip crack effect lasting just over three seconds, built around a snapping crack. It feels abrupt and cheeky rather than harsh, the kind of exaggerated punctuation that turns an ordinary line into a playful put-down without needing any words at all to land it.