I have rather poor handwriting. More than the interestingly poor mean is a surprising amount of variance in the quality of my writing. I have also (subjectively) noticed a similar quality in my piano performances, whereby I’ll play a piece perfectly one moment and completely screw it up (due to a lack of dexterity moreso than a lack of mental facility with the piece) another. Perhaps this is the case with everyone, but I haven’t noticed it in others (maybe they don’t notice it in me either?)

Anyway, I’m pondering whether the two phenomena are related.