Late night knocking- What would you do???

So TV like things always seem to happen to me.  I mean crazy things that you only see on TV and when it happens, you're like WTF!!!  If you found yourself in a TV-like moment what would you do?

Lets talk about what would you do if someone you were with, operative word here is "were," decided to come knocking at your door in the dead of the night...

Scenario: It is a weekday night and I have an early morning meeting but I'm up watching TV.  Frasier just went off and I'm into the first episode of Golden Girls.  My late night TV line up on Lifetime was Will and Grace 11pm-12am, Frasier 12am-1am and Golden Girls 1am-2am.  So I know it's sometime between 1am and 1:30am.  All of a sudden there is heavy banging on my front door.  My heart stops for an indeterminate period of long agonizing seconds then kicks into high gear.  I mean heart slamming across rib cage in an attempt to leap from my body and run.  I slowly crept to the window and looked out.  My bedroom window had a view of the front of the house.  I see a car that belonged to a friend of someone I was involved with.  So now I'm like "What the hell?"  The guy and I broke up months before but something could be wrong with him, I'm not heartless so I was a bit worried.  So I slowly go down the stairs and turn on the the porch light.

It was the guy I was involved with.  Without opening my door, I asked him what he wanted.  HE wanted ME to let him in because he was worried about me.  I let him know that I was fine.  He insisted, loudly, that I let him in.  I refused.  He started in on me about if I loved him, I would let him in.  Dude, just months ago you told me that you didn't love me and you weren't in love with me for awhile and YOU want ME to let you into my house!?! Get the F*ck out of here!!!  I was missing Golden Girls and I had a meeting at 7am, I had to end this discussion.  I didn't want to argue so I threatened to call the cops.  He relented, after awhile of trying to appeal to the love I once had for him, and drove off.

Something similar to this happened to a friend of mine.  The reaction was different from mine that night and different from what I would have done again.  Now, my thing is you can't mess with where I live.  My living space is my hideaway, it is where I feel safe and comfortable.  I refuse to let someone terrorize me in my sanctuary.  I will call the cops on a friend, on an ex, on a sibling, on my mother or father if I need to!!  I'm not going to argue with you on either side of a closed door.  I'm not going to let you in to argue with you.  I'm not going to go out of my place to argue with you.  If you are knocking on my door at anytime of day knowing that I want nothing to do with you I will call the cops.  That's what the police are there for:  Protect me, Officer!

Has this happened to you?  What did you do?  If it hasn't happened, what would you do if it did?