lol. I agree. I had a pretty similar reaction. He literally shows it to you, and somehow the first time you still don't see it coming for some reason. And the guy who does it says he is going to midway through film I think too. Good movie too
I had the interesting experience of being the only one in a group watching the movie who was in on it. Some of them, who'd been extremely hostile towards the wife following the anniversary scene, were pretty ashamed of themselves by the finale.