Once the gas leak's start. Get a Napalm Zombie and let it through the tunnel with the gas leaks and once is reaches all of the leaks explode it to stop the mechanism crushing the man. Go back and pull the lever.
Call of Duty Zombies (CODZ) is a fan-managed gaming community centered around the popular Call of Duty franchise with central focus on the Zombies mode. Created in 2009, CoDZ is the ultimate platform for discussing Zombies theories, strategies, and connecting players.