As Sophie is leaving, she mentions that she has been studying the Supreme Court in Night School, and "tonight we're doing the chapter on Clarence Thomas." This reminds her that "we're out of Classic Coke at the office." This is a reference to the sensational testimony of Dr Anita Hill during Thomas's 1991 confirmation hearing in the Senate, which involved sexual harassment and a can of Coca Cola. (Sophie drops the subject there, though the audience reaction confirms that the details of the incident were well known at the time.)