Place it immediately after the line that needs shutting down, at the peak of the interruption. Open with No No Wait Wait to build the argument, then let this clip end it, and follow with Oh My God Wow for the stunned reaction that follows.
Sobre este som
This short clip is a loud Portuguese voice shouting 'Seus loucos... cala boca!' at someone talking too much, lasting just over a second. The delivery is abrupt, confrontational and deliberately over the top, turning a blunt telling-off into a joke. It feels rude in a playful way, like a friend snapping at a noisy room before everyone bursts out laughing.