One of the pleasures of flash fiction is the impossibility of ever finally defining what it is. From ancient times, as Mr Banks says, human beings have riddled, observed and questioned the world in ways that prove that brevity can be more than just the soul of wit—brevity leaves space for a reader’s imagination, and for imaginative depth. The fabulous and the magical find easier entry into flash fiction than into much traditionally structured narrative. Again, this recalls much older forms—those of the ballad, or the folk tale.
The Economist – Ultra-short fiction