Ghostbusters
Here’s a fun fact: Rick Moranis actually started out as an improv performer in Second City at Chicago. It’s no wonder that he was able to improvise in Ghostbusters. Director Ivan Reitman has openly talked about Moranis’s talent. The actor even improvised the party speech! In Reitman’s own words, “Rick just made all of it up as he was doing it.”
Caddyshack
Even when he made the decision to leave SNL, Bill Murray still graced us with his comedic genius in movies like Caddyshack. He actually came up with Dalai Lama monologue on the spot! Don’t forget the Cinderella bit either. “Carl cuts off the tops of flowers with a grass whip,” was all the script actually said.