I believe the opening scene is there to represent the differences between how the characters percieve events that take place. In the next scene, Philip and Don are discussing the event and have totally different perspectives on it. The long drawn out dinner party scene also showcases each character's viewpoint on things and how they are vastly different from the main character, Philip..
I think the writer was way off on this one. However, I like the cast and they do the best with what they have to work with. Best wishes for their opening.
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