Some of the most iconic scenes from the movie never took place in the book. Obviously we won't be reading the book, but you may want to at least read the summary on Wikipedia.
It is important to remember a few things here, one is that the movie is different because the medium is different. It is also different because this is the story the director of the movie wants to share and not the author.
Other than being in black and white throughout, do you notice anything else strange about this film? Something that is different than a typical film today?