Adultery, death, child molestation: Centering on the brutal rape and murder of a 14-year-old girl, Peter Jackson’s “The Lovely Bones” is one grief filled set-piece after another. Except it’s got Susan Sarandon laughing all the way to the suburbs. “I play kind of the comic relief,” Sarandon said of her role as Grandma Lynn in the upcoming production. “She’s [a] drinking, hard shooting, smoking [old lady] cutting across all of the pain, pain, pain. Whenever I possibly can blow smoke in someone’s face I’m doing it!” It’s a mixture of tones that’s indicative of the overall production, Sarandon said, insisting that fans who only know Jackson for “Lord of the Rings” and “King Kong” are going to be “surprised.” Sarandon The ‘Comic Relief’ For ‘Lovely Bones’?