Here's how it goes: Pick a fandom. Any fandom, though the more "ordinary" the better. Toss in a few X-Men-style mutations -- telekinesis, pyrokinesis, metamorphic abilities, whatever floats your boat. Give them to your favourite non-superhero characters, either as a spontaneous manifestation or (if you want to make things even more fun) as something they've lived with all their lives. Then shake it up and serve in a deliciously cracktastic bit of fanfic.