Lt. James Gordon: The Narrows is tearing itself to pieces.
Batman: This is just the beginning. If they hit the whole city with toxin, there's nothing to stop Gotham tearing itself apart through mass panic.
Lt. James Gordon: How are they gonna do that?
Batman: They'll be using the train.
[as Batman describes what will happen, we cut to a camera view following the monorail beam]
Batman: The monorail follows the water mains to the central hub beneath Wayne Tower. If they get their machine into Wayne station, it'll cause a chain reaction that'll vaporize the entire city's water supply.
Lt. James Gordon: Covering Gotham in this poison!
Batman: I'm gonna stop them from loading that train, but I may need your help.
Lt. James Gordon: What do you need?
Batman: [holds up the remote to the Tumbler] Can you drive stick?