Place it immediately after the hit in a fail edit, with Anime Punch landing first and this clip answering it, then follow with Sad Violin if the moment turns into a mock tragedy. Keep it as the payoff, not the setup, so the next gag starts clean.
關於此聲音
This under-three-second clip is a Japanese voice shouting “Aa, ittai, itai itai!” in a sharp, rising cry of pain. The repeated word for “it hurts” makes the hurt sound sudden and exaggerated rather than serious, giving it a comic, wincing energy that lands like a cartoon bump. It works as a quick, expressive reaction to a sting, a slip or a bad hit.