This glitch is very fun. What you need 2 do is 2 hav at least 2 people playing. U hav to run over 2 those wooden boxes and stay in that small corner. U must keep jumping and hav the other player go prone(laying down). Then hav him crawl beneath u until you hav jumped on top of him. then hav the other player stand up. U should both be standing in the EXACT SAME SPOT. Let the zombies come after u and you will notice that they go 2 u but they won't attack u.But don't move, stay stationary or else you'll move out of the spot and most likely die if your surrounded. My psn ID is Sack2478 if u want 2 add me.(i'm very good)Your welcome and have fun killing all them zombies!