Place it directly after the line that needs to fall flat, then follow it with the Dun Dun Dun sound to underline the moment before the next scene moves on.
Sobre este sonido
This is a short Spanish clip built around the single word silencio, lasting about fourteen seconds. It gives the listener a dry, awkward feeling, like a room suddenly going quiet after someone has said too much, and the pause lands as both a joke and a gentle warning to stop talking.