CHICAGO, IL – DECEMBER 18: Nate Robinson #2 of the Chicago Bulls attempts a dunk over Jared Sullinger #7 of the Boston Celtics at the United Center on December 18, 2012 in Chicago, Illinois. The Bulls defeated the Celtics 100-89. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Jonathan Daniel/Getty Images)