The best thing about mind/body training is how it makes you feel inside. But maybe the second best thing is, it lets you do impressive stuff you couldn't do otherwise. Like make it impossible for someone much bigger than yourself to bend your arm. Or make your body feel so heavy that two people can't lift you off the ground - even though they could a moment before. These Cool Ki Tricks are certainly cool, but they also teach you a lot about your mind/body state.