Can you explain Sai Baba's mysterious sleeping arrangements as detailed in the source text?

According to Chapter 10, Sai Baba's sleeping arrangements were quite extraordinary and mysterious. He slept on a narrow wooden plank, described as being only four cubits long and a mere span wide. This plank was suspended from the rafters like a swing, tied at both ends with old rags. The text highlights the imperceptible nature of His movements, noting that no one ever saw Him get on or off the plank. This miraculous feat was attributed to His great Siddhis, or powers, suggesting the plank was more a symbol than a physical necessity.