Inception: 9 out of 10.
If you haven't seen Inception yet, and you're in the mood for a good old fashioned mind fuck, this is your movie.
I totally bugged it, even when it was hurting my brain. And the best part is after the movie when you replay it in your head and try and solve the puzzle. I have my theories, but they're full of spoilers so you won't read them here.