I would venture to say that the best screwball comedy of all time would be the film, What’s Up, Doc? with Barbra Streisand and Ryan O’Neal, directed by Peter Bogdanovich.
Don’t believe me? Here’s some behind the scenes:
Behind the Scenes and Stuntwork for the Movie What's Up, Doc? with Ryan O'Neal and Barbra Streisand and directed by Peter Bogdanovich
Posted by Best Movie Stunts on Monday, July 9, 2018
And the following trailer has some great behind the scenes footage:
What's Up, Doc? Movie Trailer Barbra Streisand Ryan O'Neal Peter Bogdanovich
Posted by Unofficial: Movie Trailers on Monday, July 9, 2018