I almost hit my mom once, with a big jug of bleach in my band (sounds weird, but the fight unfolded in front of the laundry machine). I knew better though, and I held back. But my Mom ran upstairs crying and my Dad appered 2 seconds later to beat the living shit out of me for raising my hand to my Mother.
My Dad and I have been in a few minor brawls when I was younger and used to live with them. I was starting to get bigger and stronger and used to sometimes try and use violence to intimidate them when they would be very demeaning and harsh towards me, and on more than a few occasions we actually got very violent with each other.
I live with my parents again now for the first time since I was 17 (almost 4 years ago) and I am finally a full, adult size and am fairly confident I could give my dad a run around if need be. But thank god - I have much better relationships with both my parent's now than I did back then, and we all love each other very much and hopefully never go back to some of those dark places we used to frequent.