[Mal grunts at most of what Jack has to say. He really should get some sort of pain meds soon because whatever Simon gave him seems to be wearing off in the pain department but not so much in the loopy head department. However, the other man did throw around a title. Thus Mal feels he has to at least say his own before signing off.]
Captain Malcolm Reynolds.
[And no, he'll probably never ever call you "captain."]