Star describes how everything goes from beautiful to tragic for Edward in one pivotal moment.
Late last month, during MTV's "Ulalume: Howling at New Moon" special, we debuted the catalyzing scene in the upcoming "Twilight" sequel, that traumatic moment that drives all the action in the film: when Bella Swan's 18th birthday party with the Cullen family turns from joyous occasion to violent game-changer.
As committed Twilighters know, Kristen Stewart's Bella nicks her finger while opening up a present, and the sight of fresh blood triggers the need for Jasper (Jackson Rathbone) to do a little vampire feeding. In steps Robert Pattinson's Edward to smack down Jasper and make sure not a hair on his beloved's head is touched. Their relationship is forever altered.