Runaway Train

One word to describe this movie: INTENSE
This movie is very action-packed. I'm not going to say that this is my favorite movie of all times, after all there are some parts that were particularly disturbing for me to watch: Manny getting stabbed in the hand, Ranken shoving the train operator's head into the toilet, and Manny getthing all his fingers ripped off.
Mr. Bennett mentioned to the class to watch for examples of how Manny is portrayed as a train. Throughout the movie, Ive noticed how Manny is so persistant and so stubborn. At one point on the train, when Manny yells, "I wait for no miracle! I'm going around! Up and around! I'll make it! I'll make it!" He's so seriosuly stubborn, if he wants something, he makes sure he gets it. And if he does not get it, then it is quite scary. For example, when Buck tries hard and fails at climbing around the train, Manny keeps yelling at him, "GO GO GO!!" and when Buck comes back onto the train exausted, Manny really beats him up bad while yelling at him that he believes Buck can do anything if he sets his mind on it. Really, Manny reminds me of the runaway train that he is on. The train never stops once, but keeps moving onward at faster and faster speeds.
I find it ironic how the film really portrays Ranken and Manny as similar but different, like alter egos of each other. Besides the fact that they look alike and that both are evenly stubborn, Ranken is high in power while Manny is a lowly criminal. However, though Manny is the ultimate runaway criminal from a high-security prison, Ranken is the one that is portrayed as satanic and evil through-and-through.
I also noticed that when Manny goes on a rampage, yelling at Ranken up in the helicopter, he impulsivly pours the red wine onto his (was i the injured?) hand. He clenches his fist at the same moment. It really looks as if he is squeezing out blood. And i thought, "oh, this guy is set out to kill!" there's definately no stopping him now.
I have a few questions:
Why does Ranken and Manny hate each other so badly? Why does Ranken want to kill Manny so much as to go after him on a helicopter? And why at one point, does a guy from the helicopter fly in through the window, crash the glass pane, and end up killing himself? I initially thought that the glass-breaking can allow Ranken  easy access to come in through the broken window, but this is not the case. And lastly, i've been thinking about the significance of the scrap metals hanging off each side of the damaged head of the train. Mr. Bennett says that the metal is shaped a certain way to resemble something. I kind of thought that the pieces of metal resembled a face mask and that each side of the train has a seperate half of the mask. Am i mistaken? Because i can't really see the significance of that.
I would  like to conclude with a comment about the conclusions of all films that we have seen so far. All the three movies that the class has seen had left me with the same reaction: "What? That's it?" The movies simply end while you expect more to come. And in all three of them, a person dies in the end. Is this a trend that will be seen in all the movies that we will be viewing?