[metallion]

In the grocery store
We push the cart using our legs, knees and feet - using our hands only as sensors - and not by knocking it to random destinations by means of jerky wrist actions.

In the better place
Same thing. We use a heavy, deliberate accelerating action through the ball. Not a "fast" weak jerky action. If the Hands are behind as a reslut of a jerky wrist action, there will be no pressure on the inner part of the right hand index finger and thus no feedback to the Computer.