So, I've see this one leg drill and decided to give it a try to see what it's all about. Stupid question here but- how is one supposed to draw energy to throw from their hips if the rear leg can't initiate the motion? When I do the one leg drill it seems like all I am doing is balancing on my front leg and using my arm motion (all arm) to pull my hips through. The transfer weight point from the rear to the front brace leg is the hip initiate point which starts the acceleration kinetic chain. I think this is best felt with a baseball swing. Ever try to balance on your front leg and swing a bat for power? Forget it. Even though in the baseball swing your weight gets transferred and braced against the front foot it's the rear foot and leg that powerfully starts the hip and torso rotation.