I liked how they departed from the book when Bella was bitten by James and Edward had to suck the venom back out of her bloodstream. Instead of Edward just doing it and saying, "Is that better, Bella?" and stopping without much of an apparent struggle, Edward kept draining her body of blood, and Carlisle had to pressure him into stopping by saying, "Edward, find the will."; "Edward, stop. Her blood is clean, you're killing her."; "Edward...Edward!"
Yeah, that was really awesome, and how they made her fade away into her unconscious not by the injuries she had sustained from being thrown around the ballet studio like a frisbee, but by Edward nearly killing her when he tried to save her. Truly an iconic moment there.
"It makes me... anxious... to be away from you."
-Edward, Twilight, p. 188