Playing with light trails is one of the most gratifying photography tricks out there. An unexpected, spectacular shot can actually be quite easy to achieve. You only need a little technical information, and the rest is all luck! This past summer, I headed to San Francisco for a fabulous night photography class. One of the exercises was to photograph car lights on the crookedest street in San Francisco, Lombard. The street, although lit up with lamp posts, is pretty dark. To see the zig zag of the car lights driving down the curves really captures the feeling of the street. It also provided a creative view of one of the…