While Cortana's basically being mind raped by this handsome devil (http://halo.wikia.com/wiki/Gravemind), she spouts off various quotes related to the Halo books (specifically Fall of Reach) and greater lore. One of the quotes is "Don't look at me! I'm just my mother's shadow!", a reference to the fact that she was created from the brain of her "mother", Dr. Catherine Halsey.

It is very unfunny. :|