Yep, AJ's video had a very enlightening fact. He pulled the club shaft along the grip until the clubhead was in the left palm and showed that the palm does not represent the club face as we might naturally assume - it is actually rotated something like 90 degrees. Based on that fact, the correct way to 'close' the clubhead was to rotate your forearms up to down, rather than what most amateurs would assume from right to left.