Caddyshack
It is true that Bill Murray is one talented man. However, we bet you did not know he was legendary at the art of improvisation! In the movie Caddyshack, he delivered many iconic lines off the cuff. The Cinderella moment and the Dalai Lama speech were nowhere in the script! Man, we sure are glad he did not quit acting after he resigned from SNL.
Knocked Up
Seth Rogen has been in the entertainment industry for quite some time now, though his big break came with the 2007 comedy film Knocked Up. Judd Apatow liked to encourage the cast members to improvise their lines if they wished. That must be why the film was so good! The Munich; reference is only one such line.