I believe that at the current state the zombies are you can most definitely keep from being hit if you are running continuously and not vaulting over anything. However, I do agree that a zombie that was only some distance behind running at a set speed should not be warped directly to your back. I've encountered it multiple times where I'd look behind (Numpad 1) me as I am running for dear life and the zombie that was some odd feet away magically warps at my back with an animation of trying to swipe at me. It doesn't pose much the problem when you run through a building and are slowed to a point to give you room continue your way of getting beyond their line of sight. Or in other cases, find yourself a steep enough hill that will slow you down leaving you with perhaps being hit once, but with all zombies on tail behind you. Though it would be much appreciated if you are within situation, one that doesn't include building nor steep hill, to maneuver around a large piece of cover and suddenly prone within a nice set of bushes. Now most certainly this can already be done to get a zombie off your tail, but you see that problem is that if they are already at a close (enough) range, they can warp right to your back. This would lead you to understand that doing such a maneuver isn't going to be 100% in your favor unless you've already had some distance between it. From said previous, this leads me to another issue. After remaining at stealth in the city (known for it's wondrous amounts of frame drops to me), still doesn't hold accurate though on the meter says you are clearly not visible or heard. One case I had only just one zombie in a city notice me, to where he naturally came running to me, I was in prone with both visibility and sound at a 100% none, and I took my ak74u to fire off a round in his chest. This occurred left the zombie dead and to my surprise without the follow of other zombies. As I turned around there was a zombie not too far off. The gun shot didn't attract him? I slowly crouched to him and he was in definite startle. Again, a simple prone with same results on the visibility and sound with one shot off in it's chest left with another kill in the bag along with no attraction to self. At this point, I was pretty confident I was onto a new discovery. A zombie walking about around the corner of a building without knowledge of my presence was about to get a bullet to the head. This time, I left myself within a stealthy state and kept visibility and sound at a 100% 0. Shot fired!! Oh dear... I just called in the cavalry of unit zombie. Within 1 second (I do not exaggerate that time) all of 6 zombies had surrounded me and instantaneously knocked me out. Miraculously... I made it out of that. Based off of my little story above, I can only assume that they arrived around me in such time because of their "warpy" nature as you say. Or... Because of loud gun fire within a pretentiously large zombie spawn gives them reason to spawn just around the building to come right around to surround you before you even have time to stand up from prone; because everyone knows that standing up from your stomach takes a year and a day. Stating another issue being the fact that you close a door to block known oncoming slaughter, but seemingly is a most certain failure attempt seeing as solid objects do not obstacle it's path. For they can simply walk through walls and doors alike. Yet, you are unable of such majestic powers unless you have assistance of a friendly zombie to push you out and to the other side. Alas, at it's current state the zombies can be easily dealt with if you keep in mind that if you are caught in it's eye for a tasty treat, you run and never stop running until you've found that steep hill or building that will slow them down. Because these things have a higher certainty for your survival than any other. Of course, if you are cased with a weapon, you can do as much as this along with funneling them for kills to loot those sardines, beans, pepsi, and coke. Though, a fix to said "warp" nature with inclusion of more ways to lose a zombies track would greatly add and much appreciated. The zombies movement needing a large fix should be a priority.