If you were attacked and knocked to the ground by a determined attacker armed with a knife trying to kill you, how would you fare in this situation? Also to a point, in light of some recent discussion about revolver vs. semi auto and malfunctions in close quarter contact, notice what happens in the second scenario. How many CCW guys carry an easily accessible backup weapon of some sort? Could you even get to that if tied up like this? How long could you grapple and ground fight before exhausted?

https://m.youtube.com/watch?v=La56KNz9FFA

EDIT TO ADD THIS VIDEO. From standing start...

https://m.youtube.com/watch?v=CTwH-PS9ydM
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Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats.