There's an impressive video on youtube with just shots of physical feats of a gravity defying nature. It is worth looking at. Watching these skiers, bikers, skaters, and divers led me to consider the similarities between these feats of physical skill and daring and the kind of cerebral activity Jan Cox knew and tried to share during his lifetime, called among many things, neuralizing. Though it might seem a polar opposite, the goal of those in history like Jan Cox, is really the under the same tent as these dering-dos. Everything after all, is physical. And what Jan wanted his students to see was these gravity-less moments (for such is the start for either kind of physical feat) which involve accelerating through the roof. The differences between physically twirling as you fall into the water and maintaining a precious awareness of certain elements, are of course interesting: one feat is apparent and impressive to every onlooker. The other invisible to all, those who have no clue about cerebral possibilities. One must last seconds, the other has a potential for more.