Introduction of the name Madison
I am pretty sure that this movie was where the name Madison even came into existence, at least for a female. As they were walking down Madison Avenue, and Darryl Hannah heard him mention the name and said she liked it, Tom Hanks' character said "No, that isn't a name". Of course, that was the name she chose. Nowadays, the name Madison is so overly popular it is rather annoying. I remember watching this movie and loving the name, and thinking it fit her perfectly.
It is neat how a name can come into the public consciousness and become, literally, a household name.
This movie was one of the best of all time.