My get pushed partner Tineke challenged me to do panning. It's a great challenge but not so easy and I need a bit more practising. But I like the effect of blurred background and 'clear' moving subject. This one was the best of a series.
Lev running in our garden blowing the little windmill. He was willing to help me for a couple of minutes in the drizzle.
I love it. I've tried with bikes and cars too. I think people are much harder as they are not moving as fast so not as easy to get that motion in the back ground. You've captured it well though :)