Place it as the final beat after the overreaction, then follow it with Nelson's Ha-Ha for a sharper send-off, or open with Oh My God Wow to set up the fuss before the dismissal lands.
Über diesen Sound
This short clip repeats the question Who cares? twice in an exasperated voice, turning a simple dismissal into a blunt brush-off. It feels cheeky, impatient and deliberately unbothered, as if the speaker has already stopped listening and wants everyone else to move on too.