Stand on one leg and slowly bend forward and relax your spine and head. now slowly raise your air leg as high as you can and tense up to 50% and relax a few times (this is to create and control the fear of falling). Now rise and repeat this for the other leg and do this to the sides and to the back. Mind the position of your arms as you go near the point of no return and do this a few times so you can realize where you go when you tense up and where you go when you relax. Mind where your eyes are looking when you move and where they rest when you relax in the down end of the pendulum and note that the eyes usually direct the heading of the body either directly or in reverse. So if you want to roll over one shoulder you can look forward and than turn the head or look under the opposite shoulder for the body to align it self naturally for your intention.
Relax the face and remember to keep breathing.