The Joker: I just did what I do best. I took your little plan and I turned it on itself. Look what I did to this city with a few drums of gas and a couple of bullets. Hmmm? You know... You know what I've noticed? Nobody panics when things go "according to plan." Even if the plan is horrifying! If, tomorrow, I tell the press that, like, a gang banger will get shot, or a truckload of soldiers will be blown up, nobody panics, because it's all "part of the plan". But when I say that one little old mayor will die, well then everyone loses their minds!
[Joker hands Two-Face a gun and points it at himself]
The Joker: Introduce a little anarchy. Upset the established order, and everything becomes chaos. I'm an agent of chaos. Oh, and you know the thing about chaos? It's fair!
[still holding the gun, Two-Face pauses and takes out his coin]
Two-Face: [showing Joker the good side] You live.
The Joker: Mm-hmm.
Two-Face: [showing the scarred side] You die.
The Joker: Mmm, now we're talking.