The one I sent was quite unusual. I managed to think far outside the box when I wrote it. As Meg Rosoff said, it is helpful to place yourself on the edge of experience, allowing the outline of the story to become buckled. This warping of events can stop the reader in his tracks, turning a straightforward situation into an intriguing and unique set of circumstances.
The road I travelled during the making of this story had some odd diversions. They seemed like dead-ends at times, but then I twisted them back round and returned to the main track for a while. Then I went off at tangents again. I wasn't sure this scenic route would work, but I had an instinct that I should send the story. Fortunately, it was one of those times when instinct worked in my favour. A rare occurrence!