We are get-pushed partners for this week. How about trying motion blur. Either pan the camera with the moving object to blur the surroundings, or keep the camera still to blur the moving object. If you really want to be challenged, you could try a 2nd curtain flash synch.
Thanks for all the black and white photos you posted in reply to Kathy's challenge to you. I'm glad I happened to see this as I've included it in the five for voting. I almost missed it because you accidentally tagged it and two of your other ones "get-pushed-610" instead of 510. You might want to edit that tag on them.