Ghostbusters
Rick Moranis was actually an improv performer in Chicago for quite some time. That’s why it is not all that surprising to hear that he improvised many of his lines in Ghostbusters. That doesn’t make it any less impressive though! In fact, Ivan Reitman had great things to say about the actor’s penchant for improvisation.

Ghostbusters
According to him, “Rick just made all of it up as he was doing it.”
Caddyshack
Fans were disappointed to hear about Bill Murray’s decision to quit SNL. Luckily, he continues to act in movies such as Caddyshack. Did you know that he improvised the Dalai Lama monologue? The same goes for the Cinderella bit as well.

Caddyshack
If you go through the script, you will only find this: “Carl cuts off the tops of the flowers with a grass whip.”