User blog comment:Traffy731/luffy's red hawk attack/@comment-141.31.189.253-20130611200239

One person can use only one devil fruit.

On whole one piece series only Black Beard can use 2 fruits powers. Because of his body structure is difference than regular people.

Luffy is not that kind. He cant eat any other devil fruit.

SO ur theory is wrong. But nice theory.

Well, fire will come , when it becomes more heated , I think luffy just remember ace death so he heated up his whole body and he transfered that to his hand to hit hody with Red Hawk.