There is no cute or clever response to jerk like this that won't further incite his behavior. There are times when it's just best to ignore someones behavior and ride, or, walk away. When you're in a situation like that you have to ask yourself, "do I really want to escollate this situation right here and right now?" Sure, it makes you angry but you can get past that. We've all acheived our 50+ ages and along the way we've managed to control our impulses and respond, or not respond, in a mature manner.