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."

It’s not bad or unwatchable but despite the amplitude of the spectacle, the end result is underwhelming.

The joyful confection is coated in a sparkly gloss, bright enough to gleam from the darkest, most cynical corners.

Watching it is like watching the spectacle of a class clown at their best: you laugh at their jokes, instigate their defiance, and "ooooh" when they get in trouble.