What was loudest arguement/screaming fight you ever had with someone?

Have them regularly with my sisters.

1000 decibels

With my dad, last summer.
At our house in the mountains... I was driving him to a shop to get some fishing stuff, as he had a few beers and was unfit to drive. Roads in Bulgaria are not very good, especially in rural mountain areas, where potholes are common. I try to avoid most of them, but I did hit one major pothole I couldn't avoid, whole car jolted, sounded terrible, we stopped and I saw I had chipped my E420's rim. My dad was furious, even if this was my car, I payed for with my own money. So he started shouting at me for driving like a hooligan, trying to be cool and being too blind to see the pothole, even if I never went past 70kmh, cause of the bad roads. I started shouting at him in return, saying if he hit the pot hole, he wouldn't say anything and just bring up the "I'm 60, you're 25, I can do whatever I want, you can't" nonsense and there we were, on the side of the road, in a rural mountainy area, screaming our lungs off.
After the shout fest, we got back in the car. I angrily drove him to the shop, angrily drove back and after all of this, me still being pissed at him for acting like jerk, he puts a big smile on his face and hands me a beer.

I accepted and dropped the angry act, despite being still kinda pissed. Sometimes my dad does this shit. It's the only thing I've always hated about him.

One thing I will admit, he knew he screwed up after the shout match, cause on the way back, even after I did actually drive like a hooligan cause I was angry, he didn't say a thing. And I respect that.

With my mother

Parents

I had a lot of screaming fights with my ex (now dead) husband, but he could always out yell me and I'd get tired of it long before he did.

I also had a few with an alcoholic junkie woman lover until I went to AlAnon and learned to detach from her bullshit and then get her to move out of my home.

Come to think of it, I haven't had a loud argument or screaming match with someone for many years, which is a good thing, although some people have tried to start them with me. In my experience they never achieve anything except that hurtful words are almost always said and in some cases it can escalate into physical violence.

Probably some bullshit with my last ex.

One time my friend and I were arguing over a business proposal and we got so loud it could be heard twenty floors below on the street. He hurled a pot plant at me and missed but then I nailed him in the head with his iPad and we haven’t talked since.