The stabbing at the front Door

"I was in a large house with a big front yard, pacing from room to room. My girlfriend was lying on the settee when she told me someone was at the door. I went to answer it. A man I recognized from videos was standing there. I don't remember the words we exchanged, only that he got under my skin, and my irritation built until I couldn't hold it in. I stabbed him several times on his right side. He clutched the wound, blood seeping between his fingers, and stumbled away across the yard, shouting something I couldn't catch. Then I woke up. My heart was beating fast, and I felt unsettled and a bit shaken by how quickly my anger had turned violent. I drifted back to sleep, but the image of the blood stayed with me."