This is a very helpful glitch to get you to a high level in zombies.

I only tried this a couple times and it worked. When yyou pick a map, pick the temple. When you respawn go to the two windows near the water. Try to do this with a FRIEND. Now zombies will only come from these two windows. After you have a lot of points, as soon as a round ends go to the next room and to the "?" box to get good wepons.After that go back to the other room to the two windows. If you dont have anyone all yyou have to do is run between the two windows. If you need someone message me and ill be HAPPY to help. Just message me and we will play but only for ds.