In my "episode" I put my hand in my pocket intending to retrieve the cell phone, then instantly thought the better of it, and out of awkwardness left my hand in my pocket. That however proved beneficial as the nut suddenly
turned pale, eyes wide, and ran. A witness wanted to know, "do you just shoot them in TX," and I suppose the
aggressor must have similarly misinterpreted my going for the cell phone as going for a gun--- hence his rapid "adios."
Anyway, while we often read here to use the cell phone, in the heat of things that is not so practical and could be endangering. You have to keep focused on your adversary.