It doesn't take any longer to improvise 10 takes than it takes to shoot 10 takes of the same thing. It turns out to be just as responsible from a business point of view as anything else.
Harold RamisI had developed a survival skill of using my wit to score for myself. If a scene was dying, I'd lob in these little bombshell lines that would get me some attention and a laugh without really helping the scene.
Harold Ramis