Can you describe Sai Baba's unusual sleeping arrangement as detailed in Chapter 10 and explain how it demonstrated his divine powers?

Chapter 10 provides a vivid description of Sai Baba's unique sleeping quarters. He would rest on a narrow wooden plank, just four cubits long and one span wide, which was suspended from the rafters with rags like a swing. The text notes that his movements onto and off this precarious bed were imperceptible, meaning no one ever saw him get up or lie down. This feat is explained not by physical means, but as a demonstration of his great Siddhis (powers). The chapter suggests the plank was merely for name's sake and that Baba's divine abilities made such an impossible act possible.