Audio problem: When Bruce is thrown into the cell, the metal door makes a loud, distinct noise as it's opened and closed. When Ducard is about to leave, he knocks on the door to signal the guards. In the following shot of Bruce, nothing is heard, but when the camera cuts back to Ducard, the door is fully open. (00:03:30 - 00:05:30)
Audio problem: When Rachel seeks out Bruce at the end of the movie, Bruce says, "I was a coward with a gun, and justice is about more than revenge, so thank you." In the first shot, his head is seen from behind, and neither his mouth nor his jaw is moving. (02:01:30)
Audio problem: After Bruce and Rachel kiss, Rachel says, "But maybe he's still out there somewhere". Her head is seen from behind, but you can see from the motion of her jaw that her mouth is moving before the words are heard. (02:02:35)
Audio problem: During Bruce's birthday party, the guests sing "Happy Birthday", but the song does not match their lips.
Audio problem: When Batman brings Rachel to the batcave, he sedates her. The sound effects of his syringe device are off. Rachel begins to pass out the moment the needle is stuck in her and the fizzing sound of the actual medicine being injected is a couple of seconds too late.
Answer: This is actually true to the comics, where a regular thug named Joe Chill was the killer of Mr. and Mrs. Wayne. There is no connection between this movie/series and Burton's "Batman"; they are separate takes on the same story, which is why things can be radically different. Burton chose to alter the storyline to give Batman an even greater reason to go after the Joker, that's his decision. Nolan chose otherwise in his presentation of the Batman legend, sticking to the original story.
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