Place it just after the confusing moment in your edit, then follow it with a shocked reaction to build on the question. A quick Ceeday huh works as a second beat, while an Oh My God wow reply gives the scene a bigger payoff.
關於此聲音
This short clip, just over two seconds long, catches Cyprien asking 'mais pourquoi?' in a rising, baffled tone, as if he has just heard something that makes no sense at all. It feels funny and exasperated, the sound of someone stuck on a question with no good answer in sight. It comes from a 2010 Cyprien video.