Place it at the end of a sequence of small mishaps, after a cartoon slip and a wrong answer have already built the sequence up, then follow it with a sad violin for a mock-tragic finish to the scene.
このサウンドについて
This is a short spoken French reaction lasting about two and a half seconds, delivering the phrase 'C'est la goutte', the idiom for the final drop that makes everything overflow. It carries a plain sense of exasperation, the feeling of reaching a limit after one annoyance too many. It works as a dry, knowing response when patience has finally run out.