It isn't a self mocking joke, but it does make fun of the guests
When Rizzo is dressed up as Mickey in the MuppetVision pre-show!
Sam Eagle: "You are not Mickey Mouse, you are a rat!"
Rizzo: "What do they know? They're tourists!"
That and the skeleton in Haunted Mansion that is holding a fast pass. I think the source of that joke could be that at peak season, you'd be dead before getting a FP! :lol:
Oh, and the Jungle Cruise skippers often make jokes about Disney. I heard these the past few times I was there:
"For those of you who haven't been here before, welcome to the Jungle Cruise! For those of you that have, you are very sad! The jokes haven't changed!"
"Environmentalists may take interest that here at Disney, we recycle many things. Our jokes, for instance, have been recycled since 1971!"