2 players only! First you have to go to teleporter C near the balcony.

Then 1 person goes near the hole by the quick revive perk, squats in front of the small ledge coming out of the ledge.

Then the other person drops down the hole and stands in the corner closest to the opening in the side of the wall. Doing this will make the zombies run up and down the teleporter stairs.

The person near the post will need to watch their window, for it doesn't work there.

This glitch dosent work with dogs and is best if you have monkeys and the wonder waffle.

Be sure not to move from that spot or the glitch will stop working.