Trivia: In the original ending for this episode (as seen in the DVD's deleted scenes), Bender says he'll be less like his old self when robot hell freezes over, to which Fry replies that it does freeze over during the winter. He reads this out of a book. In the aired ending, when Leela asks Bender to be less like his old self, he asks her if she could stand a 100' drop (or something), and Fry says "Good ol' Bender." However, you can still see the book in his hand from the original ending.
Trivia: If you watch closely, after Fry is leaning on the chair just after the countdown to ten reaches zero and he loses his balance, they cut to a close-up of the chair's legs falling over. You can see Nibbler's shadow cast on the wall in front of him. This was however retroactively added to the first season DVD. In the original airing of the pilot on TV Nibbler's shadow was not present.
Trivia: The creators were well into the late animation stage when they realized that the original moon lander had left the moon. They then added the plaque in the background that says "Returned by the historical sticklers society".