Place it at the exact moment of the mistake, early in the edit, then follow it with a cat laugh for the reaction and a Bruh sound when the character realises what happened.
關於此聲音
This is a short, hollow bonk lasting about two seconds, with a soft, rounded knock that lands like a tap on the head. It feels playful rather than harsh, turning a silly mistake into a light joke instead of a scolding. Editors use it over cats, pets and animated characters caught doing something daft, because the tap alone signals that something funny has just happened.