Metafiction according to dictionary.com is fiction that describes or analyzes a work of fiction.
So this year I am taking a British literature class and it is by far my favorite class. The other day we were reading Beowulf and my teacher had us read a story from grendels point of view. This really interested me because instead of him being a ruthless monster it showed him as a misunderstood vulnerable creature. So Metafiction gives you a different side of a well known story. Examples: Gregory Maguires Wicked, Frank Beddors The Looking Glass Wars, and a whole bunch more. So your challenge, write some Metafiction. I dont care what story you base it off of just be creative and have fun!