Fridge: The Dark Knight
- Dent's coin, which is in fact a Two-Headed Coin: He flips it several times, as if to make a decision based on the outcome (at one point conning Rachel into agreeing to go out with him if it comes up Heads). The coin always comes up heads because Harvey Dent always does the right thing. Tails isn't an option. It's only when he becomes Two-Face, and one side of the coin is defaced that any other outcome becomes possible for him.
- A lot of critics referred to the film bordering on tragedy; the structure of the film makes a little more sense if you keep in mind the traditional five-act arc of Shakespearean dramas, in which the climax comes earlier than a traditional three-act arc and ends on a lengthy, melancholy resolution (in this case, Dent holding Gordon's family hostage).
- During the scene where Batman interrogates Joker, Joker cautions him that striking the head first makes the victim fuzzy. Minutes (and several head-slams) later, he gives Batman the correct addresses, but mixes up the hostages. Though the Joker gave him a Sadistic Choice and intentionally mixed up the addresses, it could almost be Black Comedy. He did warn Batman that the victim's head gets fuzzy…
- Bearing in mind that the Joker does things like this adds an extra twist to the scene with the two barges. What would have really happened if someone had pushed their detonator? Were they wired to their own barges, to another building, or was the one in Joker's hands the only working one? This makes the prisoner's dilemma even more complicated if the occupants of both boats think that their detonator won't blow up the other boat.
- During really tense moments (such as when Batman is interrogating Joker), the soundtrack takes on a a high pitched tone, automatically making the viewer nervous.
- In the climax, Batman tells Harvey that Joker chose him because "he wanted to prove that even someone as good as you could fall". So, in other words, Joker wanted to bring one of Gotham's best people down to his level. Sound familiar? The only difference is that this time, The Bad Guy Wins.
- That's not all. By doing so, Joker indirectly made good on his promise of forcing Batman to break his one rule.
- Joker's Game of Chicken with the Batpod basically sums up why he's such an effective supervillain in one scene. Batman relies on fear and intimidation to beat criminals. But the Joker is something he's never faced before. The Joker is someone who's not afraid of him. While any other criminal would get scared and run, Joker just takes a gun and screams at Batman to hit him. Either because he know full well that Batman won't actually do it, or (judging by his reaction after Batman didn't do it) because he actually wants him to. Probably both.
- In the ARG that ran before The Dark Knight there was a website called ccfabg.org (Concerned Citizens for a Better Gotham) run by corrupt cops and their mob connections, which was trying to smear Harvey Dent. If you sent in your email to the organization, you would get swag back from the organization as is customary for ARGs. One of the items was a pin button with a picture of Harvey on it, one side clear and the other side red and scaly. What seemed like a Mythology Gag at the time actually has a valid explanation In-Universe. As explained by Gordon, Harvey's nickname was "Two-Face", so it would be a little inside joke for the corrupt cops to send out a pin like that.