Billo nodded but he was concentrating on something else and as I looked down through the skirt of cloud that precedes the leading edge I knew what it was. The cloud was on the move. It was devouring the Albert river and the salt flats on either side. Billo stepped on the throttle and pointed the Cruze wing back to where Donny was waiting in the dolly. Donny knew all along that the wave was gonna come in.