I could totally relate to a product design like this. I recently hired a personal trainer to relieve some stress. Working out does wonders for your stress levels, physical, and mental health. This sounds like an innovative design right up my alley. This product design was based from the Law of Conservation of Energy the fact that energy can not be created nor destroyed, but it can be transformed from one state to another. This literally turns your stress into usable energy. Sounds awesome right? The Stress Buster consists of a punching bag, kicking column, and squeeze ball. All of these features have a piezolectricty layer that has the ability to generate an electrical field. There is a rechargeable battery that fills up every time the user kicks, punches, or squeezes the gadget. The squeeze balls are actually portable and can be turned into an emergency light source. Everything also has a power outlet so you could use this as a generator if the power were to ever go out on you at home! Cool invention.