Someone in my Dream tried to kill me but I was able to kill him instead.

My Mother and I visited our friend in China and that night we all when out to dinner and talked about touring around the city. Once it got dark I was sleepy and wanted to go to bed. I don't know what time it was but I heard a noise and it woke me up. It also woke my moms guy friend up too. We both looked at each other and suddenly a man rushes me with a knife in his hands, he pauses and says "American?" I grab his knife and stab him in the neck with it. I push him off me and the guy next to who I know ask me if I am ok/ I tell him no that I just killed someone. While we are talking a sound of the radio turns on and its playing rap music and he runs in with a baseball bat and I hear a man cry out. I wait for a minute and I hear nothing. Out of the shadows I see this large man holding the baseball bat and a knife and that's when I wake up.