Sometimes when you learn how something works, you think, Thanks knowledge, that really helped, everything makes more sense, and other times you look up how wrists turn, and it's like WTF?!
@RickiTarr oh, this explains why my PT said "palm UP not palm DOWN" for some exercises to help a hurty shoulder
@draNgNon @RickiTarr This prompted me to try holding my mouse up against the underside of my desk - a very weird experience!