When Homer is trying to get to Marge as her plane is taking off, he gets on one of the mobile stairs in a manner similar to Jim Carrey in the movie "Liar Liar"
In the opening scene Bart is shown with shrimp on his plate. But in the season 18 episode "Please Homer, Don't Hammer 'Em" it is revealed that Bart is allergic to shrimp. He may have lied about being allergic, or this episode aired before that one.