For those who don't know, "MSPAFA" is an acronym for "MSPaint Adventures Fan Adventure." Either that or "Forum Adventure," one of the two. Basically, it's a choose-your-own adventure similar to MSPaint Adventures; a thread on a forum is started with a picture and a small intro, and the story is built up (or played out) as the audience provides suggestions.
I'm doing one with !ProtractorNinja (https://www.deviantart.com/protractorninja) and it can be found here: http://www.mspaforums.com/showthread.php?32224-You-Are-Now-Pickbot :D