Definitely, it's nice to deconstruct a conclusion as an exercise. For that particular idea I simply didn't know how the story would be. For reference I am the kind of writer who doesn't necessarily plan out the book, but allows the character's to shape it through their interaction. Which incidentally is an odd prospective, when a character does something that surprises you as their creator, I would recommend it, I have quite the adventure.
So the chapter came from the seed of an idea, and the immediate excitement of how such a thought might ultimately end, I can get a little carried away on occasion.
Quite a few of my pieces are snapshots, perhaps larger in scope to your own short fictions, but all from the same universe. I have floating about in my head an entire world history and its future epochs, all mapped out and I just pick an interest spot and go for it. It is quite fun, if a touch self indulgent.
“There comes a moment in the day when you have written your pages in the morning, attended to your correspondence in the afternoon, and have nothing further to do. Then comes that hour when you are bored; that's the time for sex.”