BG follows my GF home from work, waits 10 minutes to come to door of upstairs apartment.
BG knocks on door, many, many times, very loudly. Through peep hole I can see he's both drunk, and armed with a small bat.
I open door slightly, ask him politely to leave. BG insist his "girlfriend" is in there with me and my girlfriend, starts to get agitated and aggressive.
I stick 1911 literally between his eyes, he takes two or three steps backwards, and literally falls down stairs, subsequently cracking his skull, and hurting his leg.
I dial 911, they tell me officers are already on the way, I put 1911 away, since threat has been "neutralized" by falling down stairs.
PD shows up, takes statements from me, GF, neighbor who called cops. BG spends night in jail/hospital.
Lesson learned? Be calm, and be in control of the situation. I also turned two gun haters in to gun lovers that night.