A coin held in high fingerpalm is held against the second phalange of the finger by pressure of the first and third phalanges (the first phalange being the bone at the end of the finger, the second being the middle part of the finger, and the third being the last bone of the finger that attaches to the hand).
There is contraction of the fingers to do this.
I have given this routine some practice and have come to the conclusion it is beyond my ability at my current skill level. The first fly I can mechanically do, though I doubt anywhere as smooth as Akira.
The second fly forget it. My problem is not the high finger palm coin and turning my hand over, my problem isn't even muscle p***ing the coin up to the other hand, my problem is catching the coin in high finger palm on top of the coin allready there.
When I muscle p*** a coin, the coin does not fly up flat. It continually flips over counter clockwise as it travels into the air. Usually the coin bangs against the one I am holding in high finger palm, and falls away. This is the part I am stuck at.