Chapter 10 mentions Baba's sleeping plank. How does this account illustrate His divine powers or Siddhis?

Chapter 10 explains that Sai Baba's ability to sleep on a precariously hung plank illustrates his divine powers, or Siddhis. The text questions how such a flimsy plank, tied with mere rags, could support his weight, concluding that with 'Great Siddhis residing within Him, the plank was merely for name’s sake.' The chapter further speculates on how he accomplished this feat, suggesting he possessed 'Anima,' the power to become minute. This would allow him to move easily and imperceptibly in the form of flies, insects, or ants, explaining why no one ever saw him get on or off the plank.