They ran through the graveyard as fast as they dared. It was dark and the headstones difficult to see. Sam felt detached as he ran. It was so cliché, a bunch of teenagers hanging out in a graveyard at night and suddenly zombies begin popping out of the ground. The sight of a hand thrusting up from the ground broke his reflection and he tried to put on more speed.
There was a certain amount of Narrative Imperative present in Colma being ground zero for the zombie apocalypse. There were many times more people buried there than were living there.