I presented Frank Thomas with a scene of Robin Hood leaping up to a parapet of the castle. Gravity will play a big part in how you move him. Gravity affects that also. Scene under my arm, I ambled back to the drawing board. I had never thought about it.
Gravity is an ever present force which causes secondary actions.
During our lifetime, gravity relentlessly pulls us downward to press against the earth's mass. We exercise and struggle to stand tall and erect. Walking, running, or even standing is a struggle against gravity. What is a walk but each leg, in turn, catching the body from a fall. We are in a constant state of falling and regaining position.