i twist around in the harness , tryin ' to see behind me , but i still ca n't , but ai n't the water gettin ' lighter and brighter and shinin ' all like an emerald and , oh thank you , god , it means the bottom 's comin ' up and it 's gettin ' shallower and shallower and then , as sudden as a slap in the face , there 's a white beach beneath me .