Place it at the exact cut where the talking stops, then follow the reaction shot with a bruh meme sound to underline the awkward pause, or precede it with rising chatter before cutting hard to the line.
About this sound
This is a four-second voice clip of Godefroy de Montmirail sharply ordering 'Silence la vilaine' in stern, old-fashioned French. The delivery feels funny and theatrical rather than truly angry, like an exaggerated put-down that instantly shuts a conversation down. It comes from Les Visiteurs, the 1993 French comedy film.