If someone sticks a gun in your face the fight is either already over or about to be over.
Sometimes. Certainly not always.
They seem to enjoy making the video.
Some good points...and if someone is truly aware of what's going on in their surroundings, they won't be 'surprised' by a B-G, which is one of the B-G's biggest assets, in his/her attempts to carry out their intended crime.
Also, making eye contact (not staring)...acknowledging the B-G's presence, letting him know that you know that he is there, can go along ways towards thwarting a potential attack/crime per B-G!
Awareness, first, is a key element in giving your self adequate time to be able to respond to an attack in a proper manner, and may even aid in simply avoiding the attack in the first place!
There does not exist an individual who can function in society who is capable of maintaining that level of awareness all of the time.