Panning, Part 2

At the Red Bull Soapbox Race, it was very crowded and I only had one opportunity to take an action shot of a soapbox racer. I decided to try panning again. I only had one chance and I blew it. The fire truck came down a blind corner, so I had to anticipate its arrival based on the cheering of the crowd. This proved to be very difficult. Even worse, I forgot to prefocus. Oh well, hopefully the race will come back to San Francisco next year, so I can devote more time for action shots.