When SpongeBob comes back the costumers shout: "Hip Hip Hooray." This is a reference to Gilligan's Island Goodbye Old Paint, where The Castaways shout "Hip Hip Hooray."
When SpongeBob and his friends come back underwater, everyone shouts: "Hip Hip Hooray." This is a reference to Gilligan's Island Goodbye Old Paint, where The Castaways shout "Hip Hip Hooray."