I screamed at one of my employees this morning because he has a habit of just waltzing into my office and just start talking. I chewed him out and kicked him out of my office. I hate it when he walks in while I am working (or SF'n) without knocking. I have told him many times that this needs to stop but I think I am going to have to sit him down and tell him that when the door is closed, it means you don't just walk in without knocking. He does this to everyone. That idiot.