In the rules of boxing and martial arts competitions, it is illegal to
strike a person in the back of the head for a reason.

In street fighting, a strike to the nose, with the base of the palm,
not your knuckles, will temporarily stun a victim, watering his eyes,
giving you time to either strike further or escape. Never strike a
person on the chin with your fist. The chin bone is structurally
stronger than your fist bones. In street fighting and you are the
underdog, spit in the face of your opponent and use his pause/surprise
to escape.

The recent incidents of several persons attacking an innocent person
calls for the immediate extermination of the assailants.... no
questions asked. Disfunctional people, as that, need to be eliminated
from society, as they remain a threat to decent society, i.e., not
rehabilitatable.

In movies, anything is possible.

Sonny