It's fun, it's light, [but] it has a hard time when its tries to get heavy.

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."

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

Mostly, the movie is committed to the value of a good time.