what i liked- the ending with the catchphrases, and Lisa not having one and Homer asking 'what the hell kind of catchphrase is that?', all the scenes in the box factory, Bart becoming famous, "I love you Krusty!" "Over there!", Grampa complaining because he has to pay to see his grandson, Bart repeatedly saying repetitiviness is his job, and then repeatedly saying he was going to give the best performance of his life, etc.
hilarious episode, like all of season 5. not a dull moment and definitely a classic episode. A+