when i first start watch this movie i be look for some kind of subtle metaphor but it soon dawn on me that this movie be indeed about people on a train . the interaction between people be like those you can see any day on the street and when in occasion there be a slightly more interesting situation the dialogue become stilted and boring . it not that i do not get how this film be try to portray the way people interact and it just that in this film they be very boring . if you want to see and analyse these kind of relationship you would be best to actually go out and buy a train ticket and look at the people on the train with you . it be realistic but you wouldn not go to a movie to watch a film about you sit there watch the movie .