This could have been a great film if Nolan had made one more pass at the editing and cut about 40 minutes. Also, this was such an interesting concept, why did he have to resort to the 'bad guys' and their guns. Couldn't he have invented something more interesting than the constant boring gun battles. The movie Aliens was over for me once they got out their guns and stated shooting. Guns were for Cowboys and Indian movies 80 years ago.