Action beats reaction.
It is a nice, visual confirmation of that lesson.
First learned it 45 years ago.
If you see your opponent with a knife, would you really stand your ground? You would back off a greater distance. Smarter people would even run and seek defensive weapons while running.
Idiocy ...
This demonstrates what I learned in the Amphibious Warfare Counter Insurgency School 47 years ago. Never let someone or something that threatens you get inside arm’s length.