Kaeloo makes her arm transform before she slaps Mr. Cat for losing a game of barbichette. Why? In "Let's Play Golf", Mr. Cat made fun of Kaeloo for having weak-looking, scrawny arms.
Fridge Horror
In the opening scene before the title card, Stumpy gently slaps Mr. Cat in the face as a joke. Before reacting with his usual rage, Mr. Cat's facial expression briefly morphs into one of shock, horror, and sadness. Considering the kindofbackground Mr. Cat is from, it's very likely that being slapped in the face is a Trauma Button for him.
