The Walking Dead” staged an elaborate prank on New York City to promote its upcoming mid-season return.

Dressed in full zombie regalia, complete with the extensive makeup featured on the show, jokesters infested a sidewalk grate in Union Square Park while hidden cameras caught unsuspecting pedestrians getting the shocks of their lifetimes. The result is the below video, titled “Walkers Lurk Below the Streets of NYC.”

This campaign fits the trend of viral video marketing strategies. A similar stunt in a coffee shop was recently used to promote the remake of “Carrie,” and a video of a devil baby stroller attack led up to the release of last month’s “Devil’s Due.”