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."

This is one of the few movies I've ever seen where the whole audience broke into spontaneous, loud applause a third of the way in.

While it doesn't offer any answers, it both thrills and makes you think.

The film's masterful storytelling did its job. The message was clear. No need to overdo.