Unlike in the book, here Hedwig isn't killed by some stray shot - she comes to her master's aid and rams several Death Eaters before getting killed. Sure, she inadvertently clued them about the genuine Potter, but that doesn't diminish the awesomeness.
During the trailer for the film, Voldemort asks, "Why do you live?", glaring into Harry's face. The response? "Because I have something to live for."
Dobby in Malfoy Manor:
Bellatrix: You could have killed me! Dobby: Dobby did not mean to kill -- just to... maim, or... seriously injure. *shrugs*
Death Eaters stop the Hogwarts Express to search it. They get to the back, and Neville stands up and says to their faces, "Hey, losers. He isn't here." Death Eaters, meet Neville's balls.
After Harry (in disguise) witnesses Umbridge falsely accuse a woman on trial of possessing a stolen wand, he subjects her to possibly the most cheer-worthy Oh Crap moment of the series.
"You're lying, Dolores..." *as his disguise begins to fade* "And one mustn't tell lies!"" (he then casts Stupefy, knocking her out)
