[There's very little in life that can make Luffy stop short in pretty much the exact same way, but he does so first without even turning around when he hears that voice, and then the burst of fire and--
And-- what? How? What.] A--
Ace...
[The shock is enough that that's all he manages to say at first. His name, because there's no one else that this could be, hard as it is to believe.]