Just finished reading the biography of Leonardo da Vinci. The heavy book makes for good lifting exercise for the arm.
Anyway, the very last chapter is on the woodpecker’s tongue. After putting the book down I found and read additional information on the topic.
Some videos particularly this one has good information that can help us to understand about the nature of forces.
Watched the video and think through its implications. It will help to understand some of the teachings that are found in Grandmaster Wei Shuren’s Tai Chi book on the 22-form.