As the series advances, the “ten” change. Sometimes they split into twenty when reflected in puddles. Sometimes they shrink to two and whisper secrets. They’re never explained; they are a measuring device, a continual raised weight against which Miro tests himself. In Part 17, he learns to use the water wiggles to his advantage—smashing one into another so they collide and lose momentum, like redirecting a river into a mill wheel. The camera loves that scene, slow and intimate, focusing on the small silver scars on Miro’s knuckles.