Let's analyze today's example:
He: Did you bring it?
Me: yes, it's in my car.
He: Are you telling me that I have to go for that to your car!? (shouting starts here and ends 4 minutes later)
And there I think...
1) Where the hell did I say that HE has to go for that thing?
2) geez, car is in front of the house. Getting in there takes about 45 seconds including dressing up (mainly shoes) and it'd not kill anyone to go outside!
3) I could go there. I don't mind. But it's better to shout at me with no reason than ask me, right?
At first I was guessing it's the age problem. Climax possibly, because the symptoms match a bit. But now I start to worry that it's something more. And still, talk does nothing. When we try to talk to him it ends up in either accusing us of various stuff (mostly the stuff he is doing, even gaining weight!) or in random shouting and abuse. Professional help seems impossible, because he pretends to be normal, happy open etc in front of everyone. But when the door close, the minefild activates again. Moreover it seems to be impossible to make him do anything. Walking the dog, taking care of the lawn, trees, even going for a drink outside the house, even getting the salt from kitchen, or cigarettes from livingroom. It's like having talking and very annoying vegetable. Useless, yet impossible to ignore.