A good specific example of this that isn't widely known is the "muscle pass".
It amounts to holding a coin in a classic palm position (dead center of the palm), then spending several months strengthening the palm muscles and developing a callus, until you can propel the coin a foot or so without noticeably moving your hand.
It amounts to holding a coin in a classic palm position (dead center of the palm), then spending several months strengthening the palm muscles and developing a callus, until you can propel the coin a foot or so without noticeably moving your hand.
Random video demonstrating:
https://m.youtube.com/watch?v=sJJNULXJT0Q