Had to pull one time, at home though.
Was waiting for a buddy to come over, heard a knock on the door, so I went and opened it with no gun on me, and without looking outside. Next thing I see is 5 guys in all black, wearing gloves and hoodies, mind you it was about 70 degrees in the middle of the summer. They asked if I had any weed (later found out, they had the wrong house the nieghbor in the other half of the house sold pot), I told them they had the wrong house and they just started looking at each other, almost like they were getting the nerve to act, at this point I noticed the gloves and tried to slam the door.
One guy caught it with his foot and they all jumped on it, trying ot force it open, as I was yelling they had the wrong house, and that they were about to get shot. They just laughed, and kept forcing the door. I was lucky at the setup of the door because I put one foot on the door and both hands, my back was against the wall. The only way they would get in is if the door came off the hinges. I was looking at them a foot away through the now open curtain.
My girlfriend at the time come to the top of the stairs, saying she was calling the cops and they laughed louder and pushed harder. I yelled for my gun and she hesitated, so I said it a "little meaner" to her

and she decided that would be best.
At that time she came back to the top of the stairs, this time holding a large framed nickel plated .45, and she started to come down the stairs. Now eyes became wide and they started trying to get the guys foot out of the door which was pinched by me. She handed me the gun, when one hand came off the door to grab the gun, they all pushed hard and got his foot out.
I ripped open the door, and they were fighting each other to get off the porch and one got a pistol pointed right at his face. There was force applied to the trigger from adrenaline, one flinch by him, was all it would have taken They took off.
They came back one week later to the day and got the right house, woke the drug dealer up by pistol whipping him. (huge commotion outside at 3 am, guy was standing there bleedin BAD from his head, told me what happened.) Time to move none the less.

It was a bad area, but all I could afford.
Had they got in my house, I don't know what would have happened. Me (I'm not big at all) and my 18 year old girlfriend against 5-6 large males. Would not have been pretty, that's for sure.
I have NEVER answered my door without a pistol in my hand since that day.