There's a debate about whether Zimmerman should have been carrying

[The Magistrate]

42. Actually It Does, Sir

And Zimmerman's fabrications have all been tailored to those elements of the law.

If you face an extraordinary threat to life and limb, you may still employ deadly force: hence the 'battered head on the sidewalk' swill, and the fatuous claim of a verbal declaration of intent to kill by Mr. Martin.

If you attempt to retreat from the fight, and are pursued and engaged further, you may use deadly force: hence the initial 'he jumped me as I was headed back to my truck' nonesense.

776.041 Use of force by aggressor. —The justification described in the preceding sections of this chapter is not available to a person who:
(1) Is attempting to commit, committing, or escaping after the commission of, a forcible felony; or
(2) Initially provokes the use of force against himself or herself, unless:
(a) Such force is so great that the person reasonably believes that he or she is in imminent danger of death or great bodily harm and that he or she has exhausted every reasonable means to escape such danger other than the use of force which is likely to cause death or great bodily harm to the assailant; or
(b) In good faith, the person withdraws from physical contact with the assailant and indicates clearly to the assailant that he or she desires to withdraw and terminate the use of force, but the assailant continues or resumes the use of force.