Mr. B and I were walking in our nearby park when we stopped to see Ms. C, a friendly GSD whose back fence borders on the park. Their sniffing was interrupted by Mr. A, who lives next door to Ms. C and has the run of both his front and back yards. Mr. A started a commotion that got both Mr. B and Ms. C going pretty good.
Mr. A's mom came over spewing venom, telling me that I caused such a commotion twice a day every day (which isn't true, Ms. C is seldom out), and she pointed to the "Beware of Dog" sign she has on her fence, which to her means that no one in the park could come near the fence. I told Mr. A's mom several times that the other dogs were fine until Mr. A weighed in. I couldn't, though, come up with anything else to say that might not have a negative impact on Mr. A.
My question, then: are there any snappy comebacks (more funny than strictly mean) that are appropriate to situations like this? I don't expect to change anyone's mind, but wouldn't mind learning a few lines that will leave someone like Mr. A's mom gasping for breath.