Filmed on location in Springfield,____________.
During the credits, there is a clip of Tom Hanks saying "if you see me in person, please leave me be."
SPOILER: During the end credits, Maggie utters her first word to be heard by the rest of the family: "Sequel?"
During the opening credits Ralph Wiggum sings along to the 20th Century Fox fanfare, standing in the "0" of the 20th Century Fox logo, before turning and leaving.
The DVD release includes a tongue-in-cheek disclaimer by the Environmental Protection Agency disassociating itself from the way it is portrayed in the film. The disclaimer appears on screen before the standard FBI anti-copying warning.
There are several short clips played throughout the end credits: a scene revealing the fate of Mr. Burns and Smithers, a scene in which The Simpsons family sit through the end credits, and a clip at the very end - a theatre employee (the Squeaky Voiced Teen) cleans up the audience's mess.
All the main voice actors are credited with pictures of their characters.
Besides with the 20th Century Fox logo animation. There are no opening credits, other than the title.