Works on all maps, and all you have to do is get a friend to kill theirself with their grenade in a corner. Then stand in front of them and crouch. No zombie will be able to hit you if you do it right. Let's keep this one quiet guys, this is a great glitch. :shh::shh::shh:
It works but the guy standing behind me usually gets hit on round 2 all the time. And if he dies so easily on round 2 then on round 10+ we don't stand a chance in this glitch. I tried the glitch in the corner beside the one it shows in the video and it works there also but you can still get hit occasionally.
its just that if you dont find the correct spot to do it in it can lead to both players dieing.
first the one behind the person then the person in front leading to get trapped, if you dont do it in a correct spot, it still works just that you have to kill the zombies faster because they will walk until they attack you instead of walking in a straight line into the player in the front. that is the problem with the glitch. sorry about the long paragraph