When he trips over the couch...
Ever since I first saw this movie in the theatre, the one part that always cracks me up is when Davis comes home for the first time to find Gwen there. There is one scene where he is walking from the kitchen to the living room and he trips over the couch, hits the floor and immediately stands up like nothing happened.
I notice that Goldie Hawn gives a little quick look off camera. I always wondered if that moment was scripted or not. I think Steve Martin was improvising.
Mecca