If it puts your mind at ease, you're not missing out on the rest of the story because the rest of the story simply doesn't exist. I had an idea for that one scene, and the characters just seemed to grow around that. I don't know anything else about their journey thus far, the medical condition, or even whether Jason ends up dying or not. I don't think I'm going to decide any of those things, either, because I honestly can't picture that scene doing anything but standing on its own.
Cool, cool. I too have a summer job...beats the fudge out of me every time I work, but the money's not bad. What is bad is that it's all going into paying for my education rather than lining my pockets.