I call it a Photo Safari when ever I walk down a street with camera in tow looking for subject to shoot. Sometimes I will "steal" shots but mostly I talk with strangers and at least ask if I can take their photo.
This guy smiled, turned around and bent over for the camera. He actually did not want his photo taken but he did give me permission to keep this masterpiece. We later shook hands and laughed after he saw his photo in the LCD display. All in fun.