Trivia: To prepare for his role as the Joker, Heath Ledger lived alone in a hotel room for a month, formulating the character's psychology, posture and voice (the last one he found most difficult to do). He started a diary, in which he wrote the Joker's thoughts and feelings to guide himself during his performance. He was also given Alan Moore's comic "Batman: The Killing Joke" and "Arkham Asylum: A Serious House on Serious Earth" to read. Ledger also took inspiration from Alex in A Clockwork Orange(1971) and Sid Vicious.
Question: Every time I watch the movie, I can't work out why Batman tells Gordon that he is going to save Rachel (so that Gordon's unit saves Dent), but lies and saves Dent (Gordon unit are at Dent's place but Batman enters from the back door, leaving Rachel to die). Why would he do that to Rachel as she is his oldest friend?
Question: Just how does Batman's grapple gun work? In Batman Begins, Fox says, 'It's magnetic' so I assume it can attach to anything metal. But the magnet would have to be extremely strong to support the weight of Batman, which begs the question how does it then detach from what he's fired it on? Also, where does he keep all the wire for it, and how does it have the magic ability to wrap its self around the Joker's ankle, when he's been thrown off the building and Batman shoots it at him?