Oh, you. You just couldn't let me go, could you? This is what happens when an unstoppable...

The Joker: [while hanging upside down] Oh, you. You just couldn't let me go, could you? This is what happens when an unstoppable force meets an immovable object. You truly are incorruptible, aren't you? You won't kill me out of some misplaced sense of self-righteousness. And I won't kill you because you're just too much fun. I think you and I are destined to do this forever. Batman: You'll be in a padded cell forever. The Joker: Maybe we can share one. You know, they'll be doubling up, the rate this city's inhabitants are losing their minds. Batman: This city just showed you that it's full of people ready to believe in good. The Joker: Until their spirit breaks completely. Until they get a good look at the real Harvey Dent, and all the heroic things he's done. You didn't think I'd risk losing the battle for Gotham's soul in a fistfight with you? No. You need an ace in the hole. Mine's Harvey. Batman: What did you do? The Joker: I took Gotham's white knight and I brought him down to our level. It wasn't hard. You see, madness, as you know, is like gravity. All it takes is a little push! [the Joker laughs hysterically as Batman races off and the cops come to take the Joker into custody]