'Tonight': Jimmy Tries Jeff Daniels' PB & BBQ Diet Snack

Jeff Daniels talks about playing Atticus Finch in Aaron Sorkin's Broadway adaptation of "To Kill a Mockingbird," reveals how Jim Carrey kept him from retiring after "Dumb and Dumber To" and makes Jimmy Fallon and an audience member taste an odd diet snack consisting of rice cake, peanut butter and BBQ sauce.