Everyone makes mistakes from time to time, which is why we - as movie-goers - are mostly accepting when an otherwise talented director makes the occasional bad movie. There are too many variables involved in the process, after all, to guarantee that every single feat of movie making will emerge a bonafide work of genius - there's simply no way to tell, no matter how talented you are, whether or not your picture is going to turn out all right in the end. You can only do your best and pray for a smooth and uncomplicated production process. The laws of chance would suggest that over the course of five movies, though, that a director would make at least one good one. What are the odds that a talented director might make five genuinely awful movies in a row, then? Pretty slim? Well, it happens. It happened, in fact, to the 10 directors I've assembled for inclusion on this list, all of which were - at one time or another - some of the most talented filmmakers of their era. In these cases, the slippery slope of declining artistic integrity has been getting slipperier and slipperier for a long, long time...