You know, with a whole friggin' uninhabited island to explore, with miles of pristine beach and jungle, I'm not sure why Sawyer can't go off and be by himself, especially if he's having such headaches. But he sits and scowls right by everybody, and then when some extras are banging on some sheet metal for some reason, he yells at them. And since the producers aren't shelling out for the poor extras to have lines, they just stand and stare at him instead of telling him to shove it. As usual, Kate is strolling by just waiting to stick her nose in, so she makes Sawyer get up and hustles him off to Jack in the caves.
Jack waves a pen in front of Sawyer's eyes, watching how his pupils react to changing stimuli. Kate's hanging out there for some reason, as Jack asks questions about the headaches. Sawyer even snarls at her, "Do you have to be here?" and even though the answer is "no," no one says that, like what kind of a joke doctor is Jack anyway? But it only gets worse, as Jack tells him to shut up and relax. And then he asks Sawyer more questions, about whether he's ever had a blood transfusion, or taken pills for malaria. And then, with Kate sitting right there, Jack asks if Sawyer's ever had sex with a prostitute. Kate's very keen to hear the answer to this one as well. Sawyer asks what the hell that has to do with anything, and Jack asks if that's a yes. Sawyer snarls a yes, and Kate gets all smirky, like ANY TIME YOU'D LIKE TO FUCK OFF WOULD BE FINE WITH EVERYONE, KATE. Jack asks if Sawyer's ever contracted an STD, and Sawyer doesn't answer, which Jack takes as another yes. Moving on, he asks when Sawyer's last outbreak was, and Sawyer finally stomps out of the cave. Kate, who I'm trying to figure out who she thinks she is, says, "I know he deserved it, but --" like maybe the double-crossing bank-robbing lover-killer here would like to expound a little bit more on what people "deserve," that'd be great, and Jack says Sawyer just needs glasses. Wow, from "hero" to "complex, conflicted, sympathetic human being" to "unlikable asshole" in less than a season. Well done, Jack.