Stabbing someone through the ribcage isn't easy AFAIK. I'm sure Sarge could provide an enlightening discourse on the finer point of knifemansship. (The way to a man's heart goes through his stomach, etc.) Using a knife takes more skill and training than using a baseball bat.
In most deaths due to stabbing the abdominal region is the target I believe.
normally.. first blood is enough to dissuade all but the hardest.. target the forarms and if the douche persists.. head for the soft area at the collarbone between the shoulder and neck..
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