11/30   UrbanDead question: when there are multiple Zombies at one
        location, how is it determined which one is attacked?
        \_ If you were whamming on one, it keeps attacking that one; I think
           it either goes after the one with the lowest HP, or tracks which
           one you were beating up (for example if you went for ammo) and
           keeps on going after that one.  Otherwise it's random.  -John