Just watched this promotional film for the release of What's Up, Doc? on the DVD of that particular movie. It showcases the stars Barbra Streisand and Ryan O'Neal and director Peter Bogdanovich rehearsing many scenes as well as then displaying the final cut sequences. The car chase one and the party one are especially interesting to look at. By the way, the theatrical trailer is also shown on the disc which includes an additional rehearsal footage of Bogdanovich doing the "As Time Goes By" number next to O'Neal intercut with Ms. Streisand then performing the more sexy version in place of the director. So on that note, both that trailer and Screwball Comedies...Remember Them? are both worth a look.
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