Plot: Sam Rockwell breaks down his most iconic roles in film, including 'Iron Man 2,' 'Three Billboards Outside Ebbing, Missouri,' 'Vice,' 'The Green Mile,' 'Argyle,' 'Confessions of a Dangerous Mind,' 'Galaxy Quest,' 'Charlie's Angels,' 'Fosse/Verdon,' 'The Hitchhiker's Guide to the Galaxy,' 'Seven Psychopaths' and 'Moon. '