One day, the Simpsons took a vacation in Ponyville to hang out with the ponies for a few days. It was way fun and cool and awesome and much camcorder footage was shot. Unfortunately Homer recorded over the Superbowl by mistake. Fortunately, Ponyville is about 20% cooler.
EDIT: D'oh, the waiter said "someone" on page 7. Changed to "somepony" in keeping with Equestrian speech patterns.