Dude! This is excellent! It is funny, I recognize that expression as one I wear sometimes when I play music (I know this from watching video of myself). That is the "in the pocket" expression. This man is in the pocket. In the groove. A thousand miles away and RIGHT HERE FULLY at the same time - that is what truly "playing" music means.
Much love - Carl
Thank you! Beautifully put. It's quite a feeling. I wish I had more free time to sit down at the piano...