When you think of Apple’s iMac computers the last thing that comes to mind is probably a zombie chowing down on the brains of the system — its memory.

But, on May 25th (Friday) that is exactly what customers at a downtown San Francisco Apple store were witness to. A group of about 150 zombies, decaying flesh, dripping blood and all, decended on the Union Square store, bringing about chaos and sheer terror to its customers as the living dead proceeded to gnaw away at the chassis’ of several iMacs trying to get at its central brain and memory core.