In the comments to the post about the Dark Knight this week Troy wrote:
The problem wasn't that every sandwich could have a bomb in it. The problem was every sandwich did have a bomb in it.
The context of that is my revised opinion on the film, which am going to re-write here:
There is a lot to like in the Dark Knight. I thought the reports of Ledger were being overblown because of his death but I was wrong: he is worth the price of admission, and there are great moments even when he is not around, including the motorcycle v truck street fight, the interrogation room scene, and the prisoner's ferry. But the pacing is kind of a disaster. In Tim Burton's Batman there is a cute scene where Vale and Wayne ditch the huge dining hall and go have a sandwich in the kitchen. Nolan's Batman cannot have a scene like that without putting a bomb in the sandwich. It would be possible to do a good Batman movie with a two and a half hour run time, but by never giving the audience a moment of down time, the film feels four and a half hours long.