Stranger than Fiction ending

papersky had spoilery comments about the ending of Stranger than Fiction in my last post (link to ROT13'ed version). Since I'm going to disagree at length when I'm not running out the door => , I figured it would be easier to put up a post where the comments didn't need to be spoiler-protected.

So, the ending of Stranger than Fiction. Discuss. And don't click on the comments link if you don't want spoilers.