Pretty cool idea, but I just use a sharp hatchet. Love it when people start thinking and innovating.
Hold the wood straight up and down and release it while you swing at it, even if its balancing on a point it'll stay vertical long enough for you to smack it with the business end of the hatchet and pop it open.
Hold the wood straight up and down and release it while you swing at it, even if its balancing on a point it'll stay vertical long enough for you to smack it with the business end of the hatchet and pop it open.