As Harley is arrested, Catwoman thanks Batman for the rescue, to which he states he owed her one for saving him. As Catwoman discusses their relationship and makes a pass on him, Batman pulls off his trademark disappearing act, leaving her to smile and mutter to herself "Hmm.
When Harley is apprehended, Catwoman thanks Batman for the rescue, and he reveals that she had previously saved him, thus creating an obligation. As Catwoman discusses their romantic relationship and makes a flirtatious advance on him, Batman uses his characteristic escape method, leaving her to smile and comment "Hmm.