Did you seriously just say that!?

Yesterday my car ran out of coolant, and I was in the middle of nowhere so I called one of my mother's friends to bring me a jug. I had Boss with me, and the person that was bringing the coolant is afraid of him just because of Boss' size. So anyways, the guy gets there and walks up to my car and Boss just did one little "woof". The guy jumps back, clearly afraid. Now I completely realize that some people are just afraid of dogs. Which is why I had the windows up enough so that Boss couldn't get his head out, it was down just enough to get his nose out. The guy put the coolant in for me, then starts to walk back to his truck. Boss started barking (just barking like any other protective dog. He wasn't growling and foaming at the mouth >.>), and the guy raises the coolant jug up and says "You oughta give him some of this. That'd calm him down -real- quick." I have quite honestly never been so mad in my entire life. That dog is my baby, you don -not- say that kind of crap about him, or any of my other pets. That's just sick and cruel. I mentioned the whole thing to my mom when I finally got home, and she said "Oh, he was just joking!" I don't care if it was meant as a joke, that's not something to joke about, in my opinion.