(I accidentally posted this one back in time yesterday, so have it now instead for those that don't go to page two like ever!)
A year ago, a video going by the name of Brony Gang War was released, essentially creating a mock real life territory battle between various factions of pony lovers. They have since released a second episode.
For those that didn't watch the original, it is pretty violent, so the squeamish should probably avoid it. Nothing worst than what you can find by flipping channels and ending up on an episode of Breaking Bad though!