Place it at the exact frame of the mistake, after the build-up and before any reaction shot. Pair it with a bruh for a flat follow-up, or follow it with emotional damage for a second, bigger hit in longer fail compilations.
About this sound
A very short Japanese voice clip of someone shouting 'kuso ga!' — a blunt curse hurled in frustration. The delivery is sharp and explosive, turning a tiny moment of anger into something funny and over the top. It feels like snapping at bad luck, a mistake, or an annoying surprise, with all the heat packed into about two seconds.