Jack ebbed and flowed around the rocks. Picked up dirt in thick layers on the bottom of his shoes to be deposited miles later. Filled his belly with fish and drank the rain to nourish his body. Moving, constantly, for if he slept for even a short while it would mean certain death. Acting with his most natural instincts the environment changed around him, never to be quite what it was before. While this may be detrimental to some of the creatures of the Earth, Jack knew that his presence would save others. It was not within his mind to worry over such things, he simply moved. After many years he realized he had dug himself a great hole in which he may lay, but he knew if he stopped moving he would cease to exist. So he lay in his hole working harder than ever. Centuries gone by, but with luck, centuries yet remaining.