I'm not sure, but I've seen a lot of it. From what I gathered, you have list of 25 random words and you write a sentence-long scene~ for each one set in the same 'verse, like snapshots. I don't know where we could find a list like that or if we'll have to make one ourselves, but it could be an interesting challenge: you could write the drabbles and I could draw a series of doodles and then we could post them all together and have something like an illustrated short story.