To do this glitch you cant do this with more than one person first of all. It sucks, i know but still its a great glitch and works. To do it you open up the door on thompson side and oped the upstairs. (THE POWER DOES NOT NEED TO BE ON, WHATEVER YOU WANT IT DOESNT MATTER). Then you go to the front of the telleporter that has the Type 100 on the wall right next to it. (SAVE THE LAST ZOMBIE). Then you kill the last zombie while you are on the very edge of the front of the teleporter and kill him. You will here the music signalling a new round come up. When you do run to the back of the teleporter and wait. If you did the glitch correctly then you will notice that no zombies come at all. The only downside to this glitch is that when dogs come the glitch takes longer than it does with the common zombies. If it didnt work i wouldnt know what happens, i tried it once and it worked. I would guess if you did it wrong zombies still come. I DID NOT FIND THIS GLITCH AND HAVE NO IDEA WHO DID, BUT WHOEVER DID I LOVE THEM. Another thing, i have XBL not PSN. i have no clue if this works on Playstation or not but you can give it a try and comment.