Source Code - Makes Me Confused!

(Michelle Monaghan & Jake Gyllenhaal in 'Source Code')
(2011) ★★★☆☆

'Source Code' is not completely a letdown. Yet it's not that gripping and touching as I thought it was, probably due to its preposterous science that I find pretty hard to accept though I know it should be okay for a pure sci-fi film like this. It's just a movie for us to enjoy, not a science lesson for us to learn.

Source code is a program that allows you to live the last 8 minutes of someone else's life. In this case, Colter Stevens (Jake Gyllenhaal) is repeatedly ordered to become Sean Fentress, one of the passengers on a train to Chicago, to find out who wants to blow the train up and ruin the entire city, within only 8 minutes. He must experience those 8-minutes over and again to pick up traces bit by bit to finally get his job well done. You see the problem here? Scientifically speaking, no matter how many times you go through that 8-minute, you can't possibly remember the info you've collected in the previous one. Meaning each 8-minute is fresh to you. You will definitely not have any memory of your last 8-minute. If you see what I mean here, what happens in the film will simply be like a joke.

Also said that source code is not made to change the past but to affect the future. Here's another problem. How could you affect the future without changing the past? If the past is altered, so must the future, unless you're talking about parallel universes. Things in parallel worlds however, can't and won't intertwine. They simply don't get connected. So how could Steven's text in one universe reach Goodwin's phone in another? How could Steven still be alive after his spirit has gone to Sean's body in another universe? I was so confused. Maybe I was being too serious. Maybe I thought too much. I should've relaxed and enjoyed this better piece of entertainment compared with Duncan Jones's debut 'Moon' indeed.