Producer David Heyman talks about how he decided early on in his career to make books a big part of his business. The book that changed his life? Harry Potter and the Philosopher's Stone. When he read it in galley form -- as an unpublished novel -- he was sure it would make a good film. But he couldn't predict it would become the billion dollar franchise that it has. Now, for the first time, he's in the hunt for an Oscar with his new movie, Gravity. For that, he re-teamed with Alfonso Cuarón who directed the third Potter movie. Heyman talks about how the two of them cajoled and tricked Sandra Bullock into enduring long hours alone in a high tech light box while shooting this visual effects heavy movie.