thankyou for looking and commenting. It was loads of fun, I've tried panning dogs but it's much harder because different parts of their bodies are moving in different directions. At least with the bikes it's only the wheels that turn. I found the results much better and it really captures that sense of movement, and wow did those girls move! I tried shutter speeds ranging from 1/3200th right down to 1/80th. The whole day was a great learning experience for me with my 7D which I love even more now.