The Oil Dividend and Big Oil Derrick are the bonus games which can be activated when the same scatter icon emerges a particular number of times on your reels. I managed to shoot a nice picture showing both comets in one wide-field image, with the galaxies M31 and M33 as a bonus. The goal: getting some pictures of comets 17P/Holmes and 8P/Tuttle with my small Canon Ixus compact camera piggyback...