Here's the second part of the trivia I've gathered from Nolan's Batman trilogy, as promised. Missed the first part? You can view it here. The final part will be released tomorrow, and I'll be providing a link at the bottom of this page. Enjoy!
All facts were pulled from The Dark Knight's IMDB page, unless stated or sourced otherwise.
The first four days of scheduled shooting resulted in no film being rolled. Instead, Christopher Nolan screened two films for the cast and crew with a break in between. The eight films were (in order): Heat (1995), Cat People (1942), Citizen Kane (1941), King Kong (1933), Batman Begins (2005), Black Sunday (1977), A Clockwork Orange (1971), and Stalag 17 (1953).
During the scene where the Joker crashes Bruce Wayne's party for Harvey, when he first appears in the elevator Alfred was meant to have some lines, however this was the first time Michael Caine had seen Heath Ledger with the Joker make up on, you can even see the shocked expression on his face as the Joker walks past him.
Cillian Murphy reprises his role as Jonathan Crane/Scarecrow from Batman Begins (2005) in this film. This makes him the first actor to reprise the role of a Batman villain in the whole film series.
After the Joker exits the hospital, the pause in the explosions was scripted, but Heath Ledger's actions while it was stopped were unscripted. The hospital was also a former Brach's Candy factory, according to the Chicago Tribune.
The first Batman movie that does not feature Bruce Wayne's mansion, although it is mentioned. This is faithful to the comics in the sense that in the period from 1969 to the early 1980s, Batman had moved out of Wayne Manor and lived in a penthouse. However, that version was on top of his Wayne Foundation building and that building had a secret Batcave below which he could access through a hidden elevator connection to the penthouse.
Heath Ledger directed both homemade videos that the Joker sends to GCN himself. The first video involving the fake Batman was done under Nolan's supervision. Nolan thought Ledger had done so well with that sequence, he felt there was no need for him to be there when it came time to film the scene where reporter Mike Engel reads the Joker's statement. He put his trust in Ledger and let him do whatever he wanted, ultimately pleased with the result after he'd seen the outcome.
The character of Reese is an allusion to The Riddler, who attempts to reveal the identity of Batman. Much like Edward Nygma whose name sounds like "enigma" (as in E. Nygma), Mr. Reese sounds like "mysteries".
Aaron Eckhart says he modeled his performance in part after Robert F. Kennedy, both in terms of his initially polished, dashing appearance and his preoccupation with revenge.
In preparation for his role as The Joker, Heath Ledger hid away in a motel room for about six weeks. During this extended stay of seclusion, Ledger delved deep into the psychology of the character. He devoted himself to developing The Joker's every tic, namely the voice and that sadistic-sounding laugh (for the voice, Ledger's goal was to create a tone that didn't echo the work Jack Nicholson did in his 1989 performance as the Joker). Ledger's interpretation of The Joker's appearance was primarily based on the chaotic, disheveled look of punk rocker Sid Vicious combined with the psychotic mannerisms of Malcolm McDowell's character, Alex De Large, from A Clockwork Orange (1971). Ledger also designed the Joker make-up himself, using white clown makeup and cosmetics from a drugstore, reasoning that since the Joker himself would design and apply it, Ledger should do so as well. Once his design was approved, the makeup team was responsible for replicating the look each day for filming. He also came up with the idea that the Joker should have white makeup on his hands, implying that the Joker would have applied his facial makeup himself and gotten his hands dirty in the process.
In one draft of the script, a reference to Robin being related to Rachel Dawes was considered. The character of Dick Grayson was not explicitly mentioned, however Rachel Dawes is revealed as being a relative of the Grayson family. Christopher Nolan had it removed because he didn't want to build hopes up about the Robin character appearing in a future film.
While filming the chase scene with the Joker and the SWAT vans, one of only four IMAX cameras in the world at that time was destroyed.
When Harvey Dent disarms the witness in court, he removes the magazine from the stock and holds it in his small finger. This is actually the correct procedure for emergency reloads and correcting malfunctions.
The first comic book movie to ever win an Oscar for achievement in acting, specifically to Heath Ledger (posthumously) for his supporting role as The Joker.
Aaron Eckhart described his portrayal of Harvey Dent as simultaneously coming from and being apart from the same world as Batman (Dent is the white knight of Gotham, as opposed to the Dark Knight). His challenge was "looking for the similarities and the tension between the two; to find what's similar to Batman and then what's opposite to him." Eckhart prepared for his role by studying split personalities.
The bus crashing backwards into the bank in the opening sequence was much harder to pull off than was anticipated. The bus had to be taken apart and reassembled inside the building (a disused post office), concealed behind a large false wall, and then propelled backwards with an air cannon.
The Joker's distinctive tongue flip grew out of Heath Ledger's own habit of doing that.
Jerry Robinson, one of the original creators of the Joker back in 1940, was hired as a consultant on the film (the Joker is to be portrayed according to his first two appearances in the comics, which Robinson was involved in). His "Batman" co-creator Bob Kane had earlier been hired as a consultant for Batman (1989).
That's all! Is there anything that you felt should have been in this list? Let me know in the comments! Stay tuned for facts on The Dark Knight Rises!