Chapter 10 mentions Baba's movements were imperceptible. What does this refer to and how is it explained?

The imperceptible movements mentioned in Chapter 10 specifically refer to how Sai Baba would get onto and descend from the narrow wooden plank suspended from the ceiling where He slept. The text states that "when He climbed up or down, no one ever knew." This mysterious ability is explained as a manifestation of His divine powers, or Siddhis. Chapter 10 suggests this was possible through 'Anima', the power to become minute. It posits that Baba's movements were easy and could occur in the forms of flies, insects, or ants, making them unnoticeable to others.