"I have a question for you—I need to find out if you have a product or not." the elderly lady stood in front of my counter, smiling and asking questions about our inventory. I answered her questions, and directed her to someone who could help her further. It was a pretty normal exchange.
Before she walked away she said "Thank you, you are nice. I can't let you have TOO nice of a day though, so I am going to be one of THOSE customers just to keep you on your toes." That's when she began yapping like a Chihuahua at me. That's right, before God and the rest of creation an old woman barked like a dog at me. True Story.