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Dewey is about to make an I.Q. test that will determine if he'll be in the normal class, the Krelboyne class for smart children or the "special" class. Since Malcolm knows that Krelboyne's are always annoyed by their normal classmates, he convinces Dewey to get horrible results. However, the results are really awful and he is sent to the special class for Emotionally Disturbed Kids.
Craig Feldspar: Don't let it get to you Hal, soon they are gonna feel as stupid as they think we look.
Hansen: Mr. Sheridan why do motor cycles sound when they are coming than when they are going away?
Mr. Sheridan: Hanson, I'm trying to eat my lunch. By the time I explain it to you, you'd have forgotten the question anyway.