Yup, unless there are other episodes that includes a flying pig.

Lisa decides to go vegetarian/vegan (can’t recall which), and homer is preparing a BBQ. The pig somehow ends up in a pipe (all while Homer is chasing it, “It can still be saved”), and eventually the water pressure behind the pig becomes great enough to shoot the pig out.

Burns and Smithers has just made a comment about something: “when pigs fly”