The key would be to ask it to tell a few more stories with largely the same scenario (you could put them in a different place, choose two similar characters etc.). Because, let's face it, that really isn't a great story--in a word, rather "formulaic"--but we are surprised that it can generate anything like a story at all. So, the fact that a computer can be programmed to follow a different sort of formula than we normally see isn't that surprising once we realize it is just a formula.