GailSimone has challenges on twitter every now and then. Six word stories, short descriptions, whatever.
Here are a few of mine.
Superhero puberty in eight words or less: Voice, hair, hormones, X-ray vision is more fun.
Six words or less, Any superhero's post-coital statement without cursing: "...Being the fastest man alive stinks." - The Flash
A complete story in one Twitter post, featuring comic characters, without the use of the letter 'e': Tara backstabs Gar and Titans. Tara is crazy.
The story, for those who are not comics-savy, is the Judas Contract. It's very good, and I highly recommend it.