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Homer: Look, I'm supposed to get a physics tutor.
Nerd 1: Well, you've come to the right place then. If there's one thing we know, it is science.
Nerd 2: And math.
Nerd 3: And the words to every Monty Python routine.
Nerds: (in unison) We are the Knights Who Say Ni! Ni!
Homer: Heh heh Ni.