Redundant and unnecessary.

A film with more than the usual spoiler issues. Talking about it in any detail feels akin to handing you a gift-wrapped present and saying, "I hope you like it -- It's a thriller about a diabolical secret experiment."

The film never slows down or bores, plunging from one harrowing sequence to the next.

It is an exhilarating, distressing, funny and profound film, with one of the more memorable film scores in years,