Make sure he knows that you don't appreciate what he did. Don't be rude about it though, greet him kindly and talk to him about it. You'd be surprised to find that a humble, and assertive confrontation works quite well. If you do this, he will respect you, and probably apologize. Don't do any kind of foul deed in response to what he did to you. If he chooses to be arrogant even through your correct approach, you should denounce him when your opinion of him is relevant.