Place it right on the movement itself, after a short wind-up and before the landing hits. For a jump, put Mario Jump first, then let this clip carry the jump, and finish a failed landing with SpongeBob Fail for the payoff.
关于此声音
This is a two-second cartoon slide whistle, a bright toot that slides up or down to match a fast move on screen. It feels playful and silly, turning a slip, jump or sudden drop into a light joke instead of a mishap. It comes from old-school animation and comedy editing, where it was used to underline exaggerated movement.