Jim Collum, foreground, and other students work on light saber skills during a Golden Gate Knights class in San Francisco, Sunday, Feb. 10, 2013. A group of San Francisco Star Wars fans who want to travel to a galaxy not that far away have created a combat choreography class for Jedis-in-training with their weapon of choice: the light saber. (AP Photo/Jeff Chiu)

Golden Gate Knights instructor Alain Block teaches during class in San Francisco, Sunday, Feb. 10, 2013. A group of San Francisco Star Wars fans who want to travel to a galaxy not that far away have created a combat choreography class for Jedis-in-training with their weapon of choice: the light saber. (AP Photo/Jeff Chiu)

Gary Ripper, dressed as Darth Vader, walks past a Yoda doll during Golden Gate Knights class in San Francisco, Sunday, Feb. 10, 2013. A group of San Francisco Star Wars fans who want to travel to a galaxy not that far away have created a combat choreography class for Jedis-in-training with their weapon of choice: the light saber. (AP Photo/Jeff Chiu)

Golden Gate Knights instructor Alain Block, left, and Gary Ripper, dressed as Darth Vader, demonstrate light saber moves during class in San Francisco, Sunday, Feb. 10, 2013. A group of San Francisco Star Wars fans who want to travel to a galaxy not that far away have created a combat choreography class for Jedis-in-training with their weapon of choice: the light saber. (AP Photo/Jeff Chiu)

Golden Gate Knights instructor Alain Block, right, teaches during class in San Francisco, Sunday, Feb. 10, 2013. A group of San Francisco Star Wars fans who want to travel to a galaxy not that far away have created a combat choreography class for Jedis-in-training with their weapon of choice: the light saber. (AP Photo/Jeff Chiu)

Student Aaron Cheng jumps over a light saber swung by fellow student Starshine Medeiros during a Golden Gate Knights class in San Francisco, Sunday, Feb. 10, 2013. A group of San Francisco Star Wars fans who want to travel to a galaxy not that far away have created a combat choreography class for Jedis-in-training with their weapon of choice: the light saber. (AP Photo/Jeff Chiu)

Sophianna Ardinger meditates after a Golden Gate Knights class in San Francisco, Sunday, Feb. 10, 2013. A group of San Francisco Star Wars fans who want to travel to a galaxy not that far away have created a combat choreography class for Jedis-in-training with their weapon of choice: the light saber. (AP Photo/Jeff Chiu)