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.

Unshakable, witty and deeply felt, the film will be paying emotional dividends for a long, long time.

One of the worst ways to make a cult movie is to set out to make a cult movie.