K2 bags
© Dennis A. ClarkBags of K2 are seen on the ground where the overdoses happened in Brooklyn.
Dozens of half-dead people blindly staggered through the streets of a Brooklyn neighborhood known as "Zombieland" Tuesday morning, propping themselves up against fire hydrants and vomiting foam down their shirts.

But the apocalyptic scene wasn't for a movie. The victims had apparently smoked a bad batch of the "synthetic marijuana" drug known as K2 — and 33 people had to be hospitalized.

"It looked like a scene out of 'The Walking Dead,' " said Brian Arthur, a lifelong Brooklyn resident who posted footage of the disheartening scene on Facebook.

"These guys were wandering around, stumbling all over the place, and were completely out of it," he told The Post. "They didn't know their whereabouts, and some couldn't even get up off the floor. One guy was even trying to hold himself up with a Johnny pump [fire hydrant]. It was ridiculous."

In Arthur's video, police can be seen corralling some of the drug users as others lose their minds.

"Look at these dudes — they can't even stand straight," he says, while walking through the junkie wasteland, panning to people passed out on the concrete. "This is crazy!"

Cops said the druggies started dropping like flies at around 9:40 a.m., with most of them being found on the sidewalk and subway platforms near Broadway and Myrtle Avenue — a notorious spot for K2 users that has been dubbed "Zombieland" by cops and residents.

"That area is ground zero for K2 addicts," a police source said. "They have people there who are zonked out on K2 all the time.