Zombie alert!

A new viral clip for Brad Pitt's upcoming blockbuster World War Z has hit the Web, masquerading as a public service announcement warning the public of "Crisis Zero."

That doesn't sound good, and it's not.

The video's speaker, Michael Kim, the former head of the (fictional) Global Health Agency, explains that a series of "inexplicable events" in the form of violent attacks are wreaking havoc around the globe and threatening humanity.

So parents, hold your child close and take action before it's too late—like finding a cure for the walking dead.

World War Z, which finds Brad killin' a whole lotta zombies, invades theaters on June 21.

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