The squirrels scurrying around the park are irresistible just now if you are out with a camera. They are all so busy, gathering conkers and come and go from all sorts of directions.
If they spot you, they will pause as if to pose for the camera, and then as you are sorted and ready to shoot, they wait for the precise moment that you are about to click the camera, and then they scarper, leaving you with a badly focussed autumn leaf shot.