Finnick?"I say, "Maybe some pants?"He looks down at his legs as if noticing his outfit for the first time. Then he whips off his hospital gown leaving him in just his underwear. "Why? Do you find this"-- he strikes a ridiculously provocative pose -- "distracting?"I laugh. Boggs looks embarrassed and Finnick looks more like the guy I met at the Quarter Quell

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In this quote, the narrator is talking to Finnick. Finnick is wearing a hospital gown and notices for the first time that he looks strange. He then takes off his gown, leaving him just in his underwear, and poses provocatively. The narrator laughs and Boggs looks embarrassed. Through the whole exchange, Finnick looks more like the person that the narrator met at the Quarter Quell. This means that Finnick is back to his usual upbeat and provocative self, despite being in the hospital.