Just as the water returns, when the clear water is only about an inch deep, the shift in direction disturbs the flat sand, just a little. The sand moves in long parallel ripples an inch or two to the west. Focusing just on the patch of sand, it’s like when you’re pulling slowly into a parking spot and a huge black SUV is slowly pulling out of the next spot. For a split second it feels like you’re going twice as fast. All the ripples of sand moving to the west together, vertigo, just for a second and then walking, waiting for the next wave to wash by and the next glimpse into the universe next door.