Brief moments of smarter, more intricate gags tease a more engaging watch, but one that is lost in the emotionally rote version we're presented with.

What a jagged little gem.

The problem with the film for me is... beyond that joke, about yeah the attack is happening in a petting zoo, there really isn't that much to entertain.

Firmly in the tradition of Shaun of the Dead but with a dash of School of Rock, this joyously irreverent horror comedy bursts with barbs, gags and gore galore.