In the past we've griped a little that the promo material for 'World War Z' was hiding the zombies, which seemed just a bit counterproductive for a big zombie movie. No such complaints today, however, as the first featurette for the summer release has arrived, introducing us to plenty of crazed swarms of the undead. Check it out after the break!

This behind-the-scenes look gives us some fresh (albeit quick) peeks at those rolling, rollicking zombie hordes as director Marc Forster gives us the lowdown on the film's plot. Watch as a zombie launches herself through a car windshield, then as a batch of corpses hurl themselves off roofs! Plus, more of those lovely/scary aerial shots of doomed cities that seem to be the film's specialty.

The end of the footage also brings us a line of dialogue that should serve as the movie's tagline: "Mother Nature is a serial killer." Kind of chilling.

Starring Brad Pitt, Mireille Enos, James Badge Dale, David Morse and Matthew Fox, 'World War Z' opens on June 21.