I was playing with a mechanical pencil by pushing the lead out about an inch then pushing it back in like a vaccine shot. Then I realized I was doing it on my finger (not on a vain). I was wondering if you could stab a needle through your bone, I figured it was a no. But then I wondered if it was possible to do with a diamond needle that was really sharp. But I know the sharper it is means the thinner it is at the tip, so would a diamond needle stab through your bone or just snap?