Scenario...you are at home by yourself with a young child, you hear footsteps and rustling outside of your door, before you can even process the footsteps a chainsaw (yes, chainsaw) begins cuttting it's way through your front door. No way to identify who is outside, just a bunch of noise and a chainsaw in the process of breaching your front door. The child is crying, saw is sawing....you are armed and have seconds to decide before the door no longer seperates you from whatever is on the other side. What do you do?