When directors and producers set out to make a movie, it’s easy to envision they have this perfect idea in their head from the beginning, and that idea is what moviegoers eventually see on the big screen. But that’s just not how the creative process works. From beginning to end, changes both big and small are happening as the finished movie is coming together. This happens most often on the cutting room floor where entire scenes are edited out, but it also happens during filming, when unplanned moments come to light. In these cases, it’s usually the actors who are making slight tweaks to their planned lines. Usually, the director yells “Cut!” after hearing this and informs the actor just to read the line as given. But there are times when the improvised line is so perfectly suited for the moment, it makes the entire scene (and film) better. These famous lines not in the script were simply too good for the director to cut from the film.