Panning with different shutter speeds:
A series of panning shots were taken of our dog Monty chasing a ball. The shutter speed was decreased each time and gives a very different impression of speed across the series.
Shutter speed: 1/160 sec
Shutter speed: 1/40 sec
Shutter speed: 1/20 sec
Shutter speed: 1/10 sec
Out of the 2 series of movement images my preference is for the panning shots. Out of those I prefer the one at 1/20 sec which conveys the impression of speed and still gives a fairly clear image of the subject.
And a one off image of a pheasant in flight abstracted to a blur of movement and colour.