It only makes sense to be as careful as possible, you have all the time in the world to study or take precautions, and it only takes an instant to permanently cripple yourself. A friend of mine just had his index finger completely crushed, and had to have reconstructed, pinned, implanted into his body, and they just performed the operation to bring it back out, if he keeps the finger (they dont decide to amputate it after all of this) he\'ll still be missing the top joint. So be careful.