My thoughts on 'the ending' *spoilers*
My opionions on this movie, it was ok but could have been better.
First off, they dragged the movie on for too long. It just basically killed the suspense after the sudden shooting and killing of Kerry Isalano.
Secondly, do we really know that they are finding the right "suicide bomber" or is this for another government or brainwashing purpose? Maybe Paul Brodie wrote all the right answers to the questions on that survey so he got to play Phase 2. They just needed to run through the drill for perhaps point three.
Thirdly, how do we know that Ms. Reilly isn't being tested as well to see if she is suitable for their plans?
Finally, I see no direct relationship to the movie "Cube" as they are just stuck in a white observation room. They should have added a few more intense moments or some background filler with Ms. Reilly instead of dragging their feet.