The joker watches harley as she falls backwards into acid. He was originally going to leave her in the acid. But something hits him he had feels for harley so he couldn't just leave her to die. He sighs and takes off his jacket and throws it to the ground he walks to the edge of the floor. He jumps off and lands into the acid he grabs harley and pulls her up. He gives her a big kiss to wake her up as soon as her eyes open he smirks and laughs. He kisses harley deeply again