The famous scene that begins when Ty Webb’s golf ball crashes into Carl Spackler’s ramshackle house was not in the original script. It was added by director Harold Ramis after realizing that two of his biggest stars, Chevy Chase and Bill Murray (who did not get along due to a feud dating back to their days on Saturday Night Live (1975)), did not have a scene together. The three met for lunch and wrote the scene together. Although it has nothing to do with the plot, it is widely regarded as the funniest scene in the movie. This is the only time that Chase and Murray have appeared in the same scene together.