How to Get the Cache Grab achievement in Left 4 Dead 2's DLC

The boys from Achievement Hunter are back! And in this tutorial they'll show all you zombie hunters, how to get a pretty sweet achievement in Left 4 Dead 2's newest DLC, The Passing. The cool thing about this new DLC, is not only do you get some pretty sweet weapons, but you're able to meet the old cast from Left 4 Dead and interact with them for a little bit.