[Runkmud]

Wow Katy, I'm sorry to hear that. I'd try to talk to him to find out what the real issue is. Find out whether it's something you did to him that your unaware of, or if he's just going through some midlife crisis. The way it sounds though, it probably won't be fixed through negotiation. If it can't, and he ever threatens you with physical violence, go straight to your boss. Try to grease the wheels of his departure. There's nothing worse than having a job you hate going too, and by the sounds of it, it might be a him or you type situation. Make it him.