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Why is he taking his left thumb of the board and in front of the neck when playing the F#? He is doing that a lot. Curious about that.
Excellent question - Everyone knows the place the thumb should be is over the neck, on the E string....
I couldn't play like that if I tried. Actually, I did try and I can't do it, at least not in tune with any dexterity. And it was painful within seconds, especially the over-locked knuckle.