Inverse Kinematics is really cool. Whenever you move your hand to a position, you’re only thinking of your hand moving to that position, but there’s an order of operations you dont even think about. For your hand to be in the right spot your forearm has to be in the right spot, and for your forearm to be in the right spot your upper arm has to be in the right spot. Your brain subconsciously calculates those movements. This enables very accurate motions, your hand can follow a smooth, deliberate arc towards your target