I think he set it all up. At the very beginning the man said he has 2 hobbies. a good performance and a girl. then at the end he doctor says he cant remember telling him anything but then the man says the doctor has left and now i dont have anyone to tell my story too. Maybe he is like joker, maybe he had one bad day that pushed him over the edge.
 "Fixation"){kind=icon}
 "The Company of Myself"){kind=icon}