Knife Fighter
Doug Marcaida is a Filipino martial artist who has been active for over 25 years. He is an edged-impact weapons combat specialist and designer of some of the world’s deadliest blades.
Gun Fighter
Instructor Zero is fast becoming one of the most recognizable figures in the international tactical community. While his speed and accuracy are self-evident, there are elements about this charismatic figure that remain in the shadows
What happens when you get them together?
Yeah if a knife comes out I run and if I must I shoot, but from a really long ways away.
The world gets a cool youtube video? 
When I first saw this thread I expected a propaganda video saying that knifes are better for self defense than guns. But, I was pleasantly surprised that it ended up being informative.
In self defense classes they say never go to the ground if you can avoid it. But, that considering you are unarmed. This video suggesting while carrying a firearm you have the option to fall to the ground to give you the precious second or two needed to pull and shoot your firearm is a very interesting idea. With training I could see this being very helpful in many scenarios of self defense.
Thanks for the share and also challenging my built in expectations.