During the Q&A following Thursday's American Cinematheque screening of the new Jennifer Aniston drama Cake, a woman in the audience exclaimed to the former Friends star, “I've been dealing with chronic pain for over several years and you nailed every mannerism, every emotion as well as the experience of living with it: People often think we're faking it, and we're not.” The woman was the second in the crowd who battled chronic pain, to applaud Aniston's turn as Claire…