Put this clip in your edit right after the line that needs shutting down, then follow it with the awkward moment sound effect while the other person reacts, and save the Windows XP error sound for a second derailment later in the same thread.
关于此声音
This is a short Polish voice clip of someone shouting the phrase zamknij morde, a rude shut up, delivered in a sharp, raised tone over about five seconds. It feels confrontational and irritated, but the exaggerated delivery makes that annoyance read as comic rather than threatening, like an overblown outburst you are meant to laugh at.