Witnessed today during the Jetty Road track relay. What is going on? It took me a minute or two for me to work out what was going on.
http://tdu.to/2017-05-22_Jetty_Rd_Puzzle__AJC.JPG http://tdu.to/2017-05-22_Jetty_Rd_Puzzle__AJC.JPG
Alex C - with an eye for detail