This is a Sorta old glitch, thought it was patched by now. As of 2/5/11, this still remains unpatched. I do not take any credit for this glitch, just givin you guys a peek at what it looks like.

1.) Go to the PhD Flopper/lander part of the map
2.) Prone in the corner to the left, Just East of the PhD flopper.
3.)Once proned, Look to the left and have 1-2 Zombies left
4.) Have the Zombie/Crawler hit you twice.
5.) "IF" Done correctly your character should start shaking rapidly in Second chance. And you'll glitch outside of the map.
6.) Zombie's cannot hit you here, have your freinds kill them when they Pile up
7.) Enjoy, and Get high on the Leaderboards.

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