This is a really cool discovery, IJD, thanks. For some reason it reminds me of the clarihew, in which you give a pithy biography in the space of a brief quatrain. I only ever remember the famous one about Davy, but the
Wikipedia article has dozens more. (Off topic I know, sorry IJD.)
The next layer of coolness would be to tell six-word stories that are also palindromes. (I can think of two palindrome stories that are seven words, but not six.)
I think that it's reasonable to say that a story is something that evokes an
event -- something that happened (fictional or not). Otherwise it's a description or an idea, but not a story.