These are "challenge" writings. My friend Seto wants to practice his drawing, I want to practice my writing. So we've joined forces to create art. He sketches a scene based on very basic information, and I then write a story about it. Very few expectations going into the process. So far it's been fun and I hope to tackle many more of these in the near future.
And if you haven't already found his Deviant Art page, go look at it here: http://seto1337.deviantart.com/
Look at it! You know you want to.