Chapter 10 suggests that Sai Baba's movements were imperceptible. What specific example and explanation does the chapter provide for this ability?

Chapter 10 provides a compelling example of Sai Baba's imperceptible movements through the description of his sleeping habits. He would rest on a narrow wooden plank, just one span wide, suspended from the ceiling by rags. The text explicitly states that "when He climbed up or when He descended—were imperceptible," and "when He climbed up or down, no one ever knew." The chapter explains this phenomenon was not a physical trick but a display of his Great Siddhis (divine powers). It specifically mentions the power of 'Anima,' the ability to become minute, suggesting that Baba could move as easily and unnoticeably as flies, insects, or ants, making his physical ascent and descent from the plank a mystery to onlookers.