We've covered ourshare of prosthetic hands here, but we don't always get to see them in action. This hand, the bebionic3, actually shows it doing some of the stuff you'd think it might: tying shoes, dealing cards, picking up household items, etc.
Those tasks make it sound mundane, but it's actually a pretty darn impressive hand. Not only can it squeeze and pinch, it can also do some less commonly used movements, like making the rock-on devil horns or spinning in a full circle. It even automatically grips an object when it detects that the object's slipping.