These are 2 lessons from my Exploring Ease Feldenkrais Series.
In these lessons we explore the diagonal connection of one foot to the opposite arm. The whole series is available in Movement and Creativity Library.
Make sure to clear a space on the floor where you can lie down on your back. Only do what is comfortable and interesting to you. If you encounter discomfort in any form, reduce your effort, rest often and modify the movements as you need to.