Yet that's what the new movie 'Source Code' (2011) is all about. Captain Colter Stevens wakes up in an unknown man's body, and soon discovers he is part of a mission directed by the government to find and stop a bomber on a Chicago train. The 'Source Code' program allows the soldier to cross over into another person's identity and travel back in time in order to stop the bomber from wreaking havoc and killing millions. However, the program only allows him to return to the pre-crime scene for 8 minutes. In that time, Stevens has to find the bomber, stop him from carrying out his threat, thus saving precious lives. But with so many things that could go wrong, this plan is going to be harder to pull off than expected.
For one, the possibility that tampering with the past will have repercussions in the future is a big risk. If anything goes wrong, the effects will drastically alter future events. These can be even small occurrences, such as telling someone who he really is, or stopping the wrong person who isn't actually the bomber.
Secondly, the government probably will have no influence on Stevens' actions once he is in the 'Source Code' program. This could mean that they cannot warn Stevens or give him orders while he is in the program. This would leave Stevens up to his own instincts and also vulnerable to the bomber. Lastly, the bomber may have fellow conspirators on board with him in the train itself. With strength in numbers, Stevens may become outnumbered and more exposed with no way to exit the program until the 8 minutes are over.
Whatever the outcome, this movie is sure to be a sci-fi thriller that is bound to satisfy the viewing public. Check out the official website for more details.