When a group of tourists ventures off the beaten track in the vast swamplands of the Louisiana Bayou, they find themselves trapped in a claustrophobic open locale by a very large, very active, very food-centred hippo. As the group fights to survive the impossible, relationships form and shatter and the hostile environment closes in. Taut, tense and tightly constructed with playful nods to genre conventions and highly impactful practical effects, this is a hugely enjoyable, heart-pounding survival thriller that is made to be watched with a raucous midnight audience.