Hourturn

You find yourself inside a giant hourglass and realize that you are nothing more than a tiny grain of sand within it, one among thousands. You fall into the lower half along with the other grains, after which the hourglass is turned over, and everything repeats again. But is there any way to stop it from turning and escape But is this hourglass really the only thing that exists? What awaits outside, where time is measured differently?