In the comments to this post
over in who_otp
, people are posting micro-fanfic - "stories" no more than 40 words long. (Many of them have summaries longer than the actual stories.) Some of them are quite funny.
I added a couple of contributions of my own, including what I believe may be the world's first-ever Bernice Summerfield/Horatio Hornblower crossover. (Because can't you just imagine Benny's reaction to meeting Lt. William Bush?)