I'm a former ski patroller, which is a kind of outdoors EMT / paramedic. Once, on a flight from Seattle to Boston (for a YC interview!) I walked to the aft bathroom only to find a young woman who had collapsed there, still prone and lethargic, with a stewardess standing over her with a look of annoyed disgust. An evaluation indicated she was probably just dehydrated, so I had the still-annoyed stewardess bring her water, which revived her. (Of course I recommended that she see a doc when we landed just in case, but I doubt she did.) After an hour or so we were able to get her back to her seat. The rest of the flight was uneventful. The only thing that never added up was the bizzare attitude of the stewardess.

(edited: semi-conscious -> lethargic)