Bob Newhart was the king of deadpan comedy, with that classic hesitant delivery that left everyone in stitches. Once, he teamed up with Dean Martin on his show, and things got hilariously out of hand. Now, Martin was famous for never rehearsing—he'd just read his lines off cue cards during the live show, seeing them for the first time right then and there. But when he shared the stage with Newhart, who was in top comedic form, Martin clearly wasn't prepared for just how funny things would get. T