Its straightforward as per the photo! The magician sits his briefcase down on a table, opens the briefcase, and removes a real bowling ball! If the floor is solid, the magician can drop the bowling ball to show it is real! Of course the audience usually thinks there must be a hole in the back of the case. Audiences are astonished however when the magician then closes the briefcase and revolves it around to show that the thin briefcase has a solid looking back! The unit comes with briefcase only, no bowling ball included. Remember, OUR PRICE INCLUDES SHIPPING IN THE USA! Get your old bowling ball out of your closet and you have a miracle! 0005CBMBOWLINGBRIEF