Grab the 12g coach gun next to the bed. Wife goes into the bathroom, closes and locks the door between the bathroom and bedroom and calls 911. Meanwhile, the intruder alarm is going off. I am not moving from in front of the bedroom door. I have the shottie pointed at the bedroom door. As I've grabbed the shottie, I've also have a Taurus 24/7 DS with 17 +1 of Hydra Shok to back up the shottie. I'm not well versed in clearing my house, room to room. I have no idea if there's actually an intruder or if so, how many; if they are armed and if so with what. I don't have a flashlight on any of my guns because I don't want to ruin my night vision. My shottie has one chamber of 00 Buck and one of #4. I chose not to use my AR because it's a little unwieldy. I've chosen my stand, and anyone breaking in and not knowing my house will have a hell of a time getting to me. I've given some thought to this exact situation. I'm no hero. It's been a long time since I've been in combat. I'm old, slow and know my limits. I'll work within those limits. But knowing my limits gives me distinct advantage over any opponent.