[KillerGremlin]

Actually, you would not need to be intoxicated. An object such as a nail or a knife does not really cover much space. If the nail was driven into your body fast enough, it would just pass through the skin, and it would feel like someone just hit you in the face. There would be virtually no sign of penetration, if something penetrated you at such a high velocity, and you just might not notice it.

There are hundreds of cases of medical tools being left inside patients every year. I know that is totally different then being impalled with a sharp object, but having a piece of metal lodged someplace in your body is not an uncommon thing.

=/