Myachi Series 3.2 :: Myachi Hand Sacks. Playing with your Myachi is a lot like playing with a hacky sack, except you use the back of your hands instead of your feet. Catching a Myachi is like catching an egg, you've got to give with it. The only difference is you catch a Myachi on the back of your hand, not your palm. The use of palms is not allowed, unless using your palms will help you avoid bodily injury. Anyone can play, so grab a group of your closest friends and get started.