Just post any pictures that involve characters of other shows/books/whatever being ponified. Or crossovers.
Hmm, not sure who this is, but it made me think of Dexter. Which gave me another thought - in Equestria, wouldn't it be rather difficult to hide you're a serial killer? "Say, Dexter, you never explained why you're cutie mark is a knife. Shouldn't it be a microscope or something? Maybe you should become a butcher instead." Annnnd sometime later, I suddenly realize the absurdity of a pony butcher. Urgh.