Inspiration for Script

Another inspiration for my improvisational script is the American comedy film, Best In Show, directed by Christopher Guest.
This script for this film is hugely improvisational and inspires me to make my opening sequence in this style as the film is also in the genre of comedy.
Christopher Guest writes a synopsis of what he wants the character to be like and the characters adlib when the film is being shot. This is how I would like to direct my film.