Another time was probably when my sister had a bunch of friends over. She was 18 and all her friends were older. It was the first time my sister invited over this one girl, Jennifer, and everything was cool until her dad, drunk off his ass, came to get her to take her home. My dad was there (this was well after my mom randomly moved out on us in the middle of the night) and watching TV in the living room, I was toy room when I heard a commotion, and "get the hell out of my house, you piece of ****!". Apparently my dad had touched/talked to the other guys daughter while she was over. Which isn't true in the slightest, granted my dad didn't talk to anyone, and was only there for the last 5 minutes of her being there. She even later confessed that she made it up. Drunk off his ass, the dad grabs my dad by the throat which made me freak the **** out. My screaming triggered EVERYONE to come inside. My sister, being the Spawn of Satan that she is went into instant "Must destory you" mode, grabs the guy by the jacket and literally about rips him off my dad. Tim, one of the other party-goers finishes the job by grabbing the guy and throwing him out of our house. My dad was fine, a little shaken. The other dad gets up and tries to come at him again, but Tim pushes him back and a bunch of people came to hold the guy down. Everyone there was literally on our side about it, because my dad was "that dad". Not a dick, but still strict. Would let you stay over if you needed a place too.
Well, this girl, seeing all what happened, started going complete ape-**** at the site of HER dad being held down by a bunch of college kids. So in return, she runs over there kicking and screaming. My sister and everyone else wasn't having that. So, my sister still hoped up on anger and adrenaline, beat the **** out of her and asked her why she was a lying *****. It was great.
Scary as **** at first, but great at the end. Of course my dad didn't go and kick the guys ass while he was being held down, he just got an ice-pack, put it on his neck, and went back to watching his show.