In San Francisco, Golden Gate Knights instructor Alain Block teaches a combat choreography class for Jedis-in-training with their weapon of choice: the light saber. (AP Photo/Jeff Chiu)

Photo by: Jeff Chiu

In San Francisco, Golden Gate Knights instructor Alain Block teaches a combat choreography class for Jedis-in-training with their weapon of choice: the light saber. (AP Photo/Jeff Chiu)