Oliver Hirschbiegel‘s Diana, which opened in Britain a few days ago and which eOne is releasing stateside sometime this fall, has a 3% positive Rotten Tomatoes rating. Face it — it’s a train wreck. And a major career pothole for Naomi Watts (who plays Diana Princess of Wales). How can Hirschbiegel make a film as masterful as Downfall and then follow it up with a couple of moderate mehs (2007’s The Invasion and ’09’s Five Minutes of Heaven) and then an out-and-out stinker like Diana? How do you un-learn how to make a film fit together just so and make it hit the mark?