This exercise exemplifies an age gradient.
(Jo) At one side of the room, begin in a fetal position as if the head and the tail were desired to be together. There is nowhere to go, nowhere to be.
(Ha) Something extraordinarily subtle provokes a break from this position into that of a newborn baby on its belly. Gradually begin crawling on the belly. Crawl till you reach a walking baby followed by walking toddler, teenager, adult, and old age. Upon old age the head is attracted to the tail.
(Kyu) End at nearly the same place you began with, Jo, and in a fetal position with the head and tail desiring to be together.