My drill for "Man approaches with knife or gun, demands money" is pretty much what Tom Cruise did in this scene from Collateral.
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That movie had some stunningly good firearms advisors and they even got Tom Cruise to do it right. Of course, law abiding citizens can't shoot someone lying on the ground unresisting, but other than that, that 'shoot' is absolutely by the training book.
I would like to keep discussing this on the proper thread, if you don?t mind.