A Dog's Reflection

The other day I was stopped at a red light and beside me was a man in a car with his dog in the passenger seat. Where he was parked there was a window on a building on the other side. What made me notice this man and his dog is that the dog started barking. When I realized why the dog was barking I started laughing. The dog was barking at his reflection in the window. The owner of the dog started laughing too. He pulled up a little so the dog couldn't see the window anymore and the dog stopped barking and acted as though nothing happened. The man never noticed me, but we were both still chuckling as the light turned green.