Of all the products of popular culture, none is more sharply etched in our collective imagination than the movies. Most Americans instantly recognize images produced by the movies: Charlie Chaplin, the starving prospector in The Gold Rush, eating his shoe, treating the laces like spaghetti. Even those who have never seen Citizen Kane or Casablanca or the Treasure of Sierra Madre respond instantly to the advertisements, parodies, and TV skits that use these films' dialogue, images, etc..