What you get from this drill : Relaxation in the upper body, learning to shift mass better, attention to contact and how to move within it. connection between the upper and lower body.
Take a partner and have him on his hands with his feet in your hands.
Move him around like a wheelbarrow in all directions gently
Move him with regard to the placement of his body and hands to help him move with more care and to be aware of the shifting of his mass
Move him with the addition of guidance from your hands (moving up and down and away from the body) to further increase his awareness
Repeat the drill with the partner facing skywards and with more care since most are not aware of their ability to move with their hands behind them.