The first trailer for the action blockbuster Rampage has dropped — and in it, Dwayne Johnson isn’t monkeying around.

Adapted from the classic 1980s arcade game, the first Rampage footage introduces “The Rock” as a primatologist named Davis Okoye, who’s spent the past few years befriending and caring for an intelligent silverback gorilla named George. That is, of course, until a rogue genetic experiment causes George to mutate into a gigantic, King Kong-sized monster and start smashing things. To save his friend, Davis teams up with a discredited genetic engineer played by Moonlight’s Naomie Harris to try to develop an antidote — and so begins a smash-’em-up destruction fest with plenty of explosions and giant gorilla action.

Oh, also? George isn’t the only animal who’s been affected. There’s also a giant killer crocodile in the Chicago River and a 30-foot wolf who can take down airborne helicopters.

Credit: Frank Masi/Warner Bros.

Rampage reunites Johnson with his San Andreas director Brad Peyton, with Jeffrey Dean Morgan, Malin Akerman, Jake Lacy, and Joe Manganiello also starring.

Credit: Warner Bros.

Rampage will, um, rampage into theaters April 20, 2018.

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