I feel you @Clouded! I'm a 17 year old guy, that also lives with a very unconscious father,
My father used to beat the sh*t out of me (for the smallest things! It is incredible! One day he had an outburst and destroyed all my little brother toys because my lil brother broke a small cabbage my father had bought, in half (he was like 4, 5 years old at the time, so I can't understand why react in that way towards a small kid that didn't even knows what he does!)), he doesn't beat me up anymore though, because I'm 17 years old and 1,92 meters/6.3 feet tall but i still hear lots of trash once in a while (he knows that I don't care about his insults and offensive language, and that I won't react to it, so..).
He never speaks with me, and I don't neither.
I don't know why he hates me so much, but since I was a kid he never really spoke with me. We don't even say "hello" to each other, nor "Good Morning" or "Good Afternoon".
Nothing. It's a weird relationship. When he opens his mouth, he opens it to tell me how idiot I am, how stupid, how scumbag of a son he had, how much he regrets having me as his son.
I really don't care anymore, and in a way, his unconsciousness made search for the opposite, so the fact that he is the way he is and because he made suffer so much, made go find and encounter this way of living in the present moment, this joy of living.
Alexander Graham Bell said, "When one door closes, another opens; but we often look so long and so regretfully upon the closed door that we do not see the one which has opened for us".
Use the time you spent with your dad as a time of practice. Remain present, don't answer to many of the words and actions he says and does. Remain present and don't say "philosophical questions or answers" like I do too (xD), because it will certainly piss him off even more. Remember the ego wants to be right, so don't try. Just let him be, and let things calm down.
He keeps screaming? Well, here some advice Eckhart Tolle gives in his book "New Earth": Pretend to be invisible. Is that simple. Pretend that the sound just goes through you. There is nothing there to receive it, it just goes though the air and disappears..It goes through you, it's that simple
Always remember that when he is unconscious, he's not being himself.
I too have to deal with such high temper dad, and It has been a freaking living hell these last years, i thought about suicide a few years back (Long story), but thank god I found Eckhart Tolle.
Hope you are having a day full of happiness and joy,