Hi, I don´t know what it means concerning the follower´s role. But for me it means the loose and untensed muscles of the arms and shoulder, then the core projection to somewhere in my breast (in TaiJi the center is located deeper), and finally the independent hip and leg section with it´s deep muscle layers that alway seeks for grounding and foundation.
If in TaiJi someone strikes and hits you, you try to discharge and conduct the energy through the hip into the ground. The same with volcadas, the woman does not transfer the energy onto arms or shoulders, its transfered through spine and upper body into the ground. As with colgadas: the idea is not to equilibrate the (horizontal) transfugal forces, but to stretch oneself and to imagine a linear line from your foot up to your head.