It is and I hate that movie for it. In theory I should love it, but the disconnect between trying to be realistic and totally ignoring reality, killed it for me. I usually love sci-fi movies, realistic or not. But I mean, if you're going to put so much work into making a main element of the movie seem physically correct and realistic, why wouldn't you put at least a little effort into making the rest of the movie somewhat believable. The movie goes between metaphysical, realistic and action-movie physics every other scene.