Based on a video game series of the same name, and only marginally better than that fact suggests. It has Dwayne Johnson in it, which is ... almost enough.

Johnson is Davis Okoye, a former Special Forces soldier (they always are, aren't they?) who works at a zoo and prefers animals to people. But Claire Wyden (Malin Åkerman) and Brett Wyden (Jake Lacy) of Energyne have created a potion (I choose my words carefully) that makes animals get huge and agressive. Three animals are transformed - including Davis's friend George, an albino lowland gorilla. The three huge animals end up in Chicago, destroying buildings.

The Rock is charming and the effects are good, but it's not enough: the movie is just too damn silly.