I explained mine in the puberty disorder thread. It's a quote from an episode of Space Ghost: Coast to Coast. In the episode "Chambraigne", Space Ghost is duped into buying a product that is "shampoo for the brain". Believing it is making him smarter, he constantly plugs the product, angering the maker of the product (Carl of the company "Carl and Sons", who is a floating brain) because Space Ghost is obviously a moron and shows that the product doesn't work. Carl and his son travel to the Ghost Planet to confront Space Ghost, who doesn't understand that the product is a placebo, which prompts Carl to say "Can you not comprehend that your ignorance will cause me to explode?" then screams and explodes. I could go into more of the banter they exchange prior to the explosion, but I don't feel like it.
Previously, I had a quote I made up that said, "I'm not the arrogant bastard I seem; I'm some other kind of arrogant bastard."
I may change it again to another Space Ghost quote, or perhaps something from Family Guy.