Generally, the looser in a fatal gun fight doesn't get to dictate what the jury is told. But where are your grounds to object to the self defense claim.
Here is that relavent section of the Florida statute again:
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.
The punk may have initially provoked the use of force but as under 2(b), the punk is no longer in physical contact and has indicated clearly that he desires to terminate the use of force. It is you who is now the assailant that continues the use of force. This gives the punk the right to claim self defense when he puts the next bullet into your noggon.