Source Code starts out with a bang (literally), but ends in a cloud of confusion, diminishing the overall effectiveness of what could have been a better movie.

Jake Gyllenhaal stars as Colter Stevens, unwillingly recruited by the government to help determine who causes a commuter train to blow up. To accomplish this mission, he must be transported back again and again in time to the same event, hoping each time to discover more clues.

Had the movie stuck with this basic premise, it probably would have been much more effective. Instead, the final act becomes so convoluted and confusing, that viewers may be left scratching their collective heads wondering the ending. The basic principle of K.I.S.S. is lost, and we are subjected to thick intellectual plot devices that left this reviewer (and his 14 year old son) confused. Sadly, once this occurs, it loses any appeal I may have had to see it again (a la Inception) to clarify parts I missed.

What becomes even more incredulous is that all of the characters in the movie seem perfectly fine discussing quantum physics and other abstract scientific thinking. Too much of a jump in reality for my liking.

Wait for it on DVD.