This challenge was presented today on Car Talk.
http://cartalk.cars.com/Mail/Haus/2003/11.01.html
I think as referees, we have a unique opportunity here, because of our extensive experience with hand signals. I hope you will all submit a suggestion or two. Then check back on this link in a week or two to see the ones they choose to "print". How many of us from this board will be chosen?
Hey, look, I've finally figured out how to post a link!!