Put it right after the mishap in an edit, then follow it with a shocked sound for the reaction and a goofy yell to turn the moment into a joke, keeping the focus on the mishap so the punch lands quickly.
關於此聲音
This is a very short vocal wail, lasting barely a tenth of a second, centred on a single stretched 'waaaa' sound. It feels like an exaggerated burst of dismay, funny because it is so brief and so dramatic at the same time, and it works best as a sudden reaction rather than a lingering cry.