People photographing

one of the things i like to take pictures of, is other people taking pictures... i like to photograph the entire scene, or only the photographer.
this is in a park but i am not sure of the name, it is next to the boston common (the park with the frog pond in it), and you often see these police officers on a horse. i think they are there only for show, and whisper to all kids and parents that they are available for pictures (im not sure about the whispering but i assume they do, how otherwise would anyone want to be pictured with a machoguy on a horse? (what was the joke again, Per? Ein Bull auf einem Pferd? oder so etwas?). this poor boy obviously does not want, although both his mum and dad are taking pictures.. :)