The actor James Franco has generously decided to show us how on earth he does it. Having caught him in that James Dean movie and those Spider-Man films -- not to mention in Nicolas Cage's deeply inexplicable "Sonny" -- I've frequently wondered how, indeed, does Franco do it. The tears, the rage, the hair. He's quite something. Here he explains, with endearing self-satire, his secrets. Franco's little brother Dave plays his pupil. And here James teaches Dave how to give a green-screen performance. And here the Francos attempt a scene from "Rebel without a Cause." Afflecks, can you top this?