If you're going to do a zombie prank, you might as well go all in and throw everything you've got at it—which includes explosions and air raid sirens going off. And lots and lots of zombies.
The different scenes in this epic prank are staged so elaborately that's it's almost like watching an episode of The Walking Dead. Albeit an episode of The Walking Dead where innocent members of the public are terrified.
Unless of course they're all actors, it's hard to tell. Either way, you have to give these guys from Dm Pranks credit for setting up such intense and enjoyable videos.