Place it at the turning point of a failed stunt, just after the setup has peaked, then follow it with the Roblox Oof Sound to mark the landing, or cut to the Run Vine Sound Effect if the character scrambles away.
About this sound
This five-second impact cue opens with a swift downward rush and ends with a heavy thud, as if a floor has vanished beneath someone. It feels abruptly chaotic, mixing cartoonish embarrassment with a jolt of danger, so a calm scene can turn into slapstick disaster in an instant. It comes from Deltarune, Toby Fox's 2018 role-playing game, where characters tumble through a closet into the Dark World.