Post-modernism in film

Yesterday I saw an interesting movie, called Crash. It is one in the series of new American films (e.g. L.A. Confidential) that brake away from the Hollywood black and white vision of the world. The movie Crash is especially interesting to watch these days, because it deals with the topic of racial/social relations in the US. The movie Crash teaches us, that we do not know who we are before we find ourselves in a particular situation, that morality is in doing not in pre-set beliefs.