Yes, I wondered about that too - mostly because I understand that his episodes always happen in the Fall and Winter. ( I always thought my X's falls off the wagon, which often happened that time of year - were related to seasonal depression disorder. He'd get depressed during the Winter. I use to dread it.)
This man acts incredibly sad, there is an aura of sadness around him, he radiates it emotionally. Very tragic. I don't know his whole history, but from the reaction from other other people at the company, this has been going on for many years. He gets a wide birth from all, almost as if he was contagious.