The hard way to get the CAVE bonus is this: Light up all four letters C A V E located at the bottom of the screen to open a hole in the middle of the board. The easy way is this: 1st Charge up Pikachu's kickback by doing a loop-de-loop around the outside of the board. It should hit a spinner which will cause it to spin, charging Pikach up. Then when the ball falls down to the bottom of the screen and bumps Pikachu. He will do a Pikachu kickback. At this time flip the flippers so that the blank spot is over Pikachu's head. You have to be quick so that the ball will go through the blank spot.