Principle behind Chopstick Demo

I am embedding a video of the physical principle I believe can explain John Chang's chopstick demonstration in the previous post. In the video embedded here you will see a pendulum maintaining a balance against gravity. The vibrating of the saw back and forth is providing the force into the pendulum and straightening it against the outside force of gravity.(It could've been more stable if it was more fast!)
John Chang is doing a similar approach, Vibrational energy (yin) is given off from John Chang to the Chopstick strengthening it against the force that would normally bend and eventually break the chopstick when you push on it in. The vibration is molecular and invisible to the eye, and probably MUCH faster than the saw!