Which hand is this minifigure extending normally? I remember more than one argument with a friend over which way LEGO minifigures' hands should be oriented to be correct (with the thumb pointed upward/inward, like a human hand's neutral position).



This gentleman is holding his left hand so the rounded side faces down, and his right hand so the rounded side faces up. Is there an officially correct orientation? The peg connecting the hand angles slightly, so I've used both orientations in different situations to keep hands on steering wheels and control panels. Did I risk aggravating any minifigure's carpal tunnel syndrome in doing so?
I personally consider the left one as up-right ever since I was a kid and that's how Lego place all their hands in their promotional pictures: