source: Dawn of the Dead
Location: unfortunately everywhere
Threat Assessment: 8. Just like your old fashion zombie except waiting to run a marathon. You wouldn't think that would be that big a difference, but whoa nelly it is. They can rush as a mass and you are still trying to reload as to eat your brains and sweetmeats.
Limitations: Still not bright, and still a bullet to the head. Shame you don't have enough time or bullets.