Stump,
The plain and simple answer is that as with a firearm you shoot to stop the threat. And you keep shooting until the threat is over.
However, if I shoot somebody carrying a knife with 5-10 pepper balls and he/she is still coming there will be an immediate transition to my firearm.
SOMEWHERE, SOMEONE IS TRAINING FOR AN ENCOUNTER WITH YOU. STILL WANT TO QUIT?
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IF YOU KNEW YOU WOULD FIGHT FOR YOUR LIFE TOMORROW, WOULD IT CHANGE THE WAY YOU TRAINED TODAY
INTIMIDATING THOSE WHO INTIMIDATE OTHERS