Use whatever works.  We operate on the premise that there are no limiting rules of engagement when it comes to protecting yourself.  

There is a 3 part process - address the immediate danger, violently counter attack, and evacuate the danger zone.  

Our goal is to dominate and neutralize the threat as quickly as possible.  We do not want to get into a fight and exchange blow for blow with someone we don’t know anything about (i.e. their capabilities, strength, speed, etc.).  Use retzef, a continuous and aggressive combat motion, to overwhelm the opposition.  Reset the attacker’s thought process by inflicting damage and disrupting their balance.  You don’t beat someone physically by painting them into submission on the street; you defeat someone psychologically and physiologically.  

All attacks are targeted to vulnerable parts of the body such as the eyes, nose, ears, throat, groin, knees, and spine.  Maintain situational awareness while dealing with a threat in order to look for additional attackers, escape routes, and weapons of opportunity.