Could you explain Sai Baba's unusual sleeping arrangements as described in Chapter 10 and how it was possible?

Chapter 10 provides a detailed description of Sai Baba's miraculous sleeping arrangement. He would sleep on a wooden plank that was merely four cubits long and one span (about nine inches) wide. This narrow plank was suspended from the rafters of the mosque, hung at both ends by old rags, like a swing. The text notes that lamps would be kept burning at His head and feet while He slept. His movements of getting onto and down from this precarious plank were imperceptible; no one ever witnessed them. The chapter explains that this seemingly impossible feat was accomplished through the "Great Siddhis" (divine powers) residing within Him, suggesting the plank's role was nominal.