Vicious attack from my good child

Vicious. I was sitting out back with my ex smoking a cigarette and I could see my son walk into the living room and switch the internet boxes. Which means he was having a hard time with the internet. I felt bad for him and as he finished and walked toward the back door I had a “poor baby” look on my face and he ripped open the back door and screamed “MONGOLOID” at me. He and my ex just about died laughing. He said later he did it because I made eye contact with him. I won’t make that mistake again. lol.