Dewey Finn: ...And Therefore E=MC2, oh, Miss Mullins, come in
Miss Mullins: I'm sorry, to interrupt but Miss. Lemmons said she heard music coming from the classroom.
Dewey Finn: Music? Uh, music. I haven't heard any music. Uh oh, you know what, Miss Lemmons must be on crack, right kids?
Miss Mullins: Uh, well, what's that?
[Points at guitar]