To those
Who keep asking what he died from. The people in this animation is resembling poop and that door he shut close is his anus. The poop didn't want to leave the anus so the mans conciousness was afraid dying. When the poop blew out of the door it was meant to resemble a fart, and when the poop finaly left from the cigarette he went mad and closed his poop in so he died of overload. The man at the office was probably meant to resemble his brain.