I don't think I ever seen the ending of a movie completely ruin the entire movie at this level before. I've seen movies with endings that are anti-climatic or disappointing, but the ending of Knowing is unique in that it makes everything that has happened in the movie pointless. I won't spoil the ending, but if you have seen it, ask yourself - how was any of that "knowing" either necessary or helpful? Hint: it wasn't. It was actually insanely cruel