On the way back to the station you and your partner see an elderly man sitting on a city bench. He is slumped over slightly to the side with his eyes closed and he does not look well. Upon closer inspection your partner notices a jug of wine that is about half full, under the man's arm. His respirations are slightly irregular, he is sweating heavily, and every few breaths he moans slightly. What is not likely the cause of this man's appearance?