If you want to make an audience laugh, you dress a man up like an old lady and push her down the stairs. If you want to make comedy writers laugh, you push an actual old lady down the stairs.
One movie I come back to time and again is 'The Hustler.' I don't think there's better dialogue in any film.
Many times I felt like I'd do better than what the director did, but some of them got a little discouraged because they didn't have full charge of making the film, and sometimes there'd be battles of egos.