Deadhead Miles. Hilarious Alan Arkin performance, with his ersatz southern Robert Duvallian voice. Of course the big difference is Duvall's always convinced he's giving a serious performance. Very similar in tone to Terrence Malick's other screenplay, Pocket Money. It just tickled me.
Watch Bobs DeNiro and Duvall try to out-method each other in True Confessions. Count how many times they look off-screen, like Jack Barrymore searching for a cue card. Takes place in 1946, when everything was fuzzy.