Two training partners touch hands lightly on a practice mat in front of a deep blue planet.
Two partners keep light hand contact and feel each other move. Neither pushes hard, so each can sense what the other will do next. Paying attention this closely trains stillness of mind.
HD 189733 b is a hot giant planet that orbits in about 2 days. Its blue colour was studied by measuring the light as the planet passed behind its star.
Practice
Rest palms on a partner's palms and follow their slow movements.