Originally Posted by crucifissio

this is true...showing a knife is preventative but you give up your huge advantage of a "surprise knife"...

for example if you are a woman who is alone and some crazy guy pulls a knife you would be best served to hide the knife and beg and cry and let the attacker think he has the upper hand...then you go crazy on his neck and run while he is in shock of what you just did...

on the other hand if you are an absolute beast and you whip out a big one then it will be preventative...

it depends on the situation a lot...

those videos you posted...the people taking out the gun are doing it completely wrong...you should sprint in the opposite direction, take out the gun, load it, and then turn around and unload and still run util the opponent drops...