"Now Scanning, I want you to ......"
"****** off!"
"What? You can't talk to me like that!"
"I just did."
I'm giving you a warning for refusing to carry out a request."
"Good! But I'll only accept the warning in the presence of the H.R. manager, and will be pleased to explain to him/her that your leadership is uninspiring, your manners are lacking, and your effectiveness as a manager is not in the best interests of the business, or us, the employees."
"I think you and I need to talk!"
"So do I. Your office or mine?"
...... and then tell him like it is. Be polite, be honest, stand you ground. Remember, the business will suffer because of him, so his bosses will have little sympathy for him if his behaviour is highlighted, which is the point of the exercise.