When you are very low on life (less than twenty should do) in the Cemetary stage as either Rikimaru or Ayame, stand in the garden area near the tree where the hands from the underground attempt to grab you. Use the Fake Death ability to lower your life to zero, and at this time, the hands should grab you. However, once you break free from the hands, you'll be alive with zero life. From this point forward, should you walk off a ledge, you will float in mid-air rather than fall. Occasionally, if you walk up a slope, you can walk underneath the level. Keep in mind that the game will revert back to normal if you take a hit. from an enemy, or if you use a healing item.