I don't understand why you guys keep making the zombies more invincible, first you added more zombies, then you added wolfs, then you increased the speed of the zombies, then you add this thing. What's next? Adding like 2,000,000 zombies, with the speed of a Ferrari, including bears, tigers and crocodiles? But guess what, they still can see you through the house walls and still can manage to hit you even they are not even next to you.