A few hours ago me and my family were eating our dinner when the news started talking about a foreign movie about a child suing their parents for giving birth to them. 
I had read a few days ago about an Indian man in his mid twenties who was suing his parents for the same reason, and I brought it up. The man's parents were lawyers, and I awkwardly laughed when I started to recall what the mother had said about the situation ("He can try, but I won't hold back against him."). My dad interrupted my talking to laugh at my awkwardness, and laughed harder when I showed annoyance. Before continuing, I quietly said "You're an asshole." between my words, as I would for many others. My dad stopped all conversation and glared at me, asking me what I had just said. I was shocked at the sudden intensity, and just stared at him. He asked me twice more, each time more intense than the last, before I answered him with what I said.
Then he said, and I quote: "You call me that again and I will fucking stab you, do you understand?"
While pointing his steak knife at me.
In front of my mother and little sister.

I've always had trouble with reading social cues due to my Asperger's, but never like this.