ere what you do pooh, when the cage drops, immidiantly throw a hand grenade on the ground, htis will break the door open and might kill a couple zealots. If you dont have a hand grenade, use the TMP of the lock. Once the door is open run out as fast as you can out of the cage because the Garrador will likely kill you. If you can get him in range of the hand grenade you thrown and he will be stunned for a couple seconds. Take care of the zealots outside of the cage and then begin shooting the garrador from outside the cage, he cant attack you because he doesnt see the cage around him. every 30 seconds or so, another zealot will jump into the cage, but this only happens about 3-4 times so you can easily handle it. Once the garrador is dead take its cash and go through the door to the next room.