Discription of Events: Knocked on apartment door going to a friends apartment and knockend on the door next to his by accident. After i walked away, I saw a white car speeding around apartment complex following me. Individual approached me, saying, "did you knock on my door ?" I apologized and said, "yes, I am sorry..I knocked on the wrong door. The male replied in a highly threatening away "make sure you know where youre lurking at, I have cameras, you dont want to fuck with me." He drive about 35 mph 4 times around parking lot which could have hurt anybody driving, walking, someone in a wheel chair whom in fact I was visiting.