After hearing that the top prize is $500 and a year's supply of dog food, Bender and Zoidberg also enter.
As they fly away from Earth, Nibbler explains to Leela telepathically that he is a Nibblonian ambassador sent to observe humans in secret.
The next morning, brains start sending blue beams at buildings, and Fry discovers that all the citizens of New New York have been rendered stupid, except himself.
They explain to her that once she re-enters the Earth's atmosphere, she will become too dumb to remember, so they write the information on a note and pin it to her clothing.
Leela arrives on Earth to tell Fry of his mission, but he takes the note, blows his nose on it, and throws it into a burning fireplace.
Fry breaks free of the illusion, and quickly writes a story in which he is crushed to death by a bookcase, one riddled with "plot holes and spelling errors".
This deficiency is caused by the events of the episode "Roswell That Ends Well" when Fry becomes his own grandfather after having sex with the woman who turns out to be his grandmother.