As I have talked to many cops, the point is to neutralize the threat. Not to shoot the threat in the leg, or any limbs. Tasers are another thing to this. A taser first off is never 100% effective to all people. Their are plenty of variables, (clothes, drugs, weapons, body size, etc). Tasers are more effective when the two prongs are farther away from each other to be able to bring the threat to the ground. Now, people think that you can just shoot a taser at someone with a knife. Well they are right, you can... if you want to take the chance of the suspect stabbing themselves when they fall (if they do). Tasers will intercept all these body movements that are being sent to the brain, making joints stop working and you will most likely stiffen up. A weapon is a weapon and should be treated as so.