Same Trick
Black Belt
That is something as the one inch strike . A well known Chen Taiji teacher in Beijing demonstrated such a strike on me(stomach) as a “Taiji strike(punch), it was not even one inch distance but almost skin touch distance, well the feeling was very unpleasant in ways not felt natural.Actually, the Taiji "brush knee twist step" can be a good example. You first touching your fingertips on your opponent's chest. You then drop your palm heel onto your opponent's chest. I'm surprise such video is not available online. Can you hurt your opponent with this kind of palm dropping? I have not heard anybody ever did that.
Anyway to succeed such a intricate strike on a moving target would be quite difficult