Place this clip at the very end of your edit, right after the offending moment plays in full. Pair it with a record scratch just before it to freeze the action, then follow it with a sad trombone for the walkaway.
About this sound
This is Michael Scott delivering the line 'Why are you the way you are' in a flat, exhausted voice, lasting about seventeen seconds. It feels weary and disappointed rather than angry, like a genuine question for someone who keeps being irritating. The clip comes from the U.S. version of The Office.