I had a rotty/lab mutt I got from the Shelter while in college. One night while at an apartment block party this girl, who lived a few apartments down, and looked like she was about 100 lbs soaking wet, is walking around drunk off her ###, and has her pitbull out on a leash, was a thick leather strap with a choke collar on the side. The door to our apartment is open and my dog is laying in the middle of my living room. She walks up to talk to my now wife, and is standing in the doorway when her dog lunges at my dog, she clearly can't hold it and her dog comes flying into my apartment and goes after my dog. My dog jumps up and a full on dog fight starts in my living room. They bounced off each other a few times and I saw a chance and I kicked that pitbull as hard as I could in the ribs/side. I swear it felt like I kicked a brick, that dog was fcking solid. It got up and turned at me, but then my dog jumped on it again, this time was ontop of the pitbull. I saw the leash and grabbed it and jerked the pitbull away and out my door and then slammed the door behind me. My apartment living room carpet had quite a bit of blood, and turns out my dog got a hold of part of the pitbull's ear at some point.
The entire time this drunken girl is in the doorway yelling, "don't hurt my dog, she's just playing, she's just playing!" We called the apartment landlord to report the attack, and she had me call the police and file a report. Then the landlord told the girl she had to get rid of the dog. She chose to leave the apartment and keep the dog. I hope nothing ever happened to anyone from that dog down the line.
I was in serious awe at just how strong that dog felt when I kicked it, it was clearly a powerful dog and she was 100% incapable of controlling it. My dog wasn't small, ~80 lbs, but I doubt it would have stood a chance had I not intervened, and it was 100% unprovoked. Not going to lie, after I kicked it and it turned to face me, I got a little nervous. I didn't know what I was going to do if it turned on me, I was thinking maybe if I kick it again in the head I'll have a chance to grab a knife from the kitchen, luckily my dog came flying back into the picture.