After directing awhile, you get an instinct about it, but you have to be able to trust your own feelings. Invariably, two-thirds of the way through a film, you say, "Jeezus, is this a pile of crap! What did I ever see in it in the first place?" You have to shut off your brain and forge ahead, because by that time you're getting so brainwashed. Once I commit myself to a film I commit myself to that ending, whatever the motivations and conclusions are.