Then raise the ante -- like riding no-hands. Try to stand on one foot, eyes closed, on a pillow. Try it with shoes on. Try it with shoes on, on a rug, on a pillow, on two pillows. You want a room full of giggling women with rehab experience -- just ask them if they can stand on one foot with their eyes closed. The PTs claim that if we can master this, it will improve our balance with our eyes open and both feet on the ground.
When Darth Vader said, "Don't underestimate the force," maybe he was talking about gravity!