I last watched it with the friend who first introduced it to me. He had seen a sneak preview in November 2005, prior to the release. His advice was not to read the story first. So, I was a complete BBM virgin, not knowing what would happen. Thanks, friend.
Now when I watch it, I have an added layer: I've been to so many of those places in Alberta! I can hardly suppress the desire to say, "I was there, and there, and there, and that place looks just like that, that place is changed, etc."
I always cry at the Lake Scene, but what struck me recently was a very strong, involuntary reaction to seeing Jack's beating. Now I find that the hardest thing, I think because I know Jack; I just can't watch a friend being beaten.