Watching this movie, I got the feeling that it was spinning wildly out of control, like it was a machine or engine that was about to destroy itself. Then I saw this video on Boing Boing of a wind turbine that broke apart after spinning too fast. If you do watch Unknown, shut it off after about an hour so you won’t see it implode.
(PS, I had tried to embed the video of the windmill exploding into this post, but WordPress didn’t want to let me. If you have any tips, let me know.)