In timing a film, we used to assume that sneaks move slowly. This was great for animators-thirty-six to forty-eight drawings for a single step-but it was sheer hell for the pace of the picture. So the rapid tiptoe was invented.
Chuck JonesThe close-up, according to D.W. Griffith, allows subtle changes of facial expression-the raising of an eyebrow or the flicker of a smile-to become part of the action.
Chuck Jones