Go to [Special Features]. Highlight anything and press [Right]. It would then highlight Jet Li's kneepad. Press [Enter] and it will show you a brief summary on the production of the film.
Special Effects Featurette
Go to [Special Features], highlight [Additional Special Features] and press [Enter]. When you're there, highlight anything and press [Right]. This will highlight Gabrielle Union's necklace. Press [Enter] and it would show you a special effects featurette.