So you wake up to someone pounding on your apartment door and yelling to open up. The time is 4am and it becomes apparent he's at the wrong apartment because he's calling someone's name to open up and come out. You yell back that there's no one here by that name, he's got the wrong place, so go away. Angry/drunk guy doesn't buy it, keeps pounding, yelling, and starts throwing his body against the door in an apparent attempt to break it in. You have a phone and a loaded gun nearby. What would you do? What order would you do it? Call 911? Grab gun first? Verbally warn the guy that you are armed? This is based on a real scenario that happened to an aquaintance recently. I have my opinion; I'm interested in yours.