A single drop of water has no power or strength. However, many drops of water can cause great pain. So in this case use your whole body to attack, like fists, kicks, knees, elbows, head butts etc.
Water can shape into any form of vessel no matter what the shape. If you put water in a rounded or square vessel, water will shape into the vessel. The Hap Ki Do student should be like water and fit any situation. Whether standing, sitting or laying, Hap Ki Do defense should fit the situation. Whether you are tall, short, fat, or thin you should adapt your Hap Ki Do to fit.