... I was dozing off...

Knowing feels like a bunch of cool ideas that were strewn about a table, picked up, shoved together, tied up with duct tape and, somehow, managed to stay working for the ride.

Rather like watching an intricately arranged set of dominos starting to topple. That's neat. I didn't see that one coming, you think, as yet another train carriage joins the pile-up.

The result should not be dismissed as an average thriller, and yet, seen in those terms, it still succeeds because Proyas is a superior director, and after several missteps, he has finally redeemed himself with another fine piece of science fiction.