The text mentions Baba's movements were 'imperceptible.' What specific example from Chapter 10 is used to explain this quality?

Chapter 10 provides a vivid example to illustrate Sai Baba's imperceptible movements through the story of his sleeping plank. He rested on a very narrow plank suspended from the ceiling by rags, a feat in itself. The chapter emphasizes that his movements—specifically when he climbed up onto the plank and when he descended from it—were never witnessed by anyone. The text poses the question of how such a flimsy setup could support his weight, answering that it was due to his great Siddhis (powers). It elaborates that Baba possessed powers like 'Anima,' the ability to become minute, which made his movements as subtle and unnoticeable as those of flies, insects, or ants.