It was Christmas Eve, 2000. I had my first apartment. There had been a contest sponsored by the management to see who could decorate the exterior of their apartment in the most popular way, then the community members would vote. The prize was free rent for a month, so, of course, my roommate and I went into overdrive.
On the 24th, I was at home alone, getting ready for bed. I had turned of all the lights, except the exterior christmas lights, and was heading to bed. I heard a noise outside, and realized that our plastic snowman had fallen over, so, I got dressed, and was heading towards the front door.
At that point I heard a scraping sound on the front door. We had a Santa Claus door covering, and I figured it had come loose and was blowing around in the wind.
When I opened the door, my neighbor stabbed me in the lower right abdomen with a lock-blade knife. Not to be outdone, I grabbed one of the three foot long plastic candy canes lining our sidewalk, and beat the shit out of him, until I could no longer wield my candy cane.
He was the boyfriend of my girlfriend's ex-roommate, and they had had a falling out. He came over to tear up my decorations, not expecting to be confronted by anyone. When I opened the door, he reacted on instinct, and stabbed me. I deflected his thrust away from my sternum, but he still managed to get me in the side. I had no internal damage. He wasn't so lucky.
The only other problem I've had was recently with a guy beating his dog, and we got into a little tussle.
Other than that, I tell my neighbors right away when I take issue with their behavior, and they are quite understanding.
I'm just skipping stones...