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."

Go in cold, and you're likely to emerge with your blood boiling. This has to be seen to be believed.

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

The movie really just wants to entertain people.