This might not help, especially as I know that men aren't as buoyant in water as women, but it might help to think of the leg as floating rather than being thrown. It's if you were in a swimming pool and the leg just drifts up when you let go of your conscious control of it. I like how Aniseteph characterizes it as "passive".
Your leg is not an actor in this drama, it is simply carried along in the wake of your movement.
Your leg is not an actor in this drama, it is simply carried along in the wake of your movement.