Michael Phelps struck me early on as emotionally very young. And parallel thought was he would be very vulnerable as he goes forward with his celebrity. The pot smoking bears these thoughts out. He has a great coach when swimming...he probably should concentrate on thoughts from a life coach away from the water. His mother is probably on his tail over this one. If it hadn't been weed it would have been something else. Figure it out now kiddo. The consequences just get bigger.