I'm not sure -- OP mentions the guy is a musician and specifically a pianist, so perhaps he just intrinsically has developed great spatial reasoning from learni

I'm not sure -- OP mentions the guy is a musician and specifically a pianist, so perhaps he just intrinsically has developed great spatial reasoning from learning and practicing with his piano for so long -- that along with him being from another country makes this make a lot more sense for me, although it's all still impressive.