Miscellaneous Carl's cane always has four tennis balls on it even after he throws one or more of them to the dogs in multiple scenes. When Carl throws the ball to Dug, Dug brings the ball back to him. However, when he throws it at the pack of dogs later on, he doesn't get it returned. Hence the reason why he only has three tennis balls in the following scenes.
Miscellaneous Charles Muntz's airship is on its way back to U.S. when Carl's house is following him, and during the struggle to retrieve Kevin the rare bird. After all this apparent flying on the same direction, Carl's house falls at same spot near the falls. However, it slides off the wing of the airship, and so becomes at the mercy of the wind.
Factual Mistake The age timelines of the characters don't add up. When we see Carl as a kid, he is maybe 10 or 12 years old and Charles Muntz appears to be in his late 20s. Throughout the rest of the movie, Carl appears to be in his 70s. This would mean that Charles Muntz would be around 100 years old. This would make some things that he does highly unlikely for his apparent age.
Factual Mistake In the title scene where young Carl Fredricksen is running with his balloon in the hand and smashes at the tree. The tree's shadow is missing behind and only young Carl has his shadow, as if he's floating in air.
Continuity When Carl and Russell first stop the house from drifting off without them, Russell does not have his backpack and Carl does not have his cane. However, right before the house hits the ground, while they are waiting on the porch, Russell is wearing his backpack and Carl has his cane. Everything is scattered from the impact and Carl and Russell chase the house and stop it right before the cliff. They simply backtracked to reclaim their belongings.
Continuity Carl uses sails to propel and steer his house. While sails don't work if the balloon/house are moving at the same speed as the air mass, they do work whenever the wind changes speed or direction. The house has significant mass (weight) and so does not respond instantaneously to wind changes.
Continuity Soon after the house is first launched and has clipped two TV aerials, an external shot of the house roof shows the weather vane rotating so the arrow is pointing south. This indicates the wind is blowing from south to north, and could not possibly take the house to South America.
Continuity In the French version of the film (with possibly analogous errors in other language versions), during the scene at the beginning when Young Ellie is showing Young Carl her scrapbook, a close-up of one of the pages says in French "TRUCS A FAIRE" but when other side shots are shown, the book clearly says in English "THINGS TO DO".
Continuity The phrase "Jiminy Cricket" was used in common slang as a euphemism for "Jesus Christ" (in context of a "cuss" word) since the 1920s. The expression is spoken in movies like The Brave Little Tailor (1938) and The Wizard of Oz (1939). Pinocchio (1940) had a character named Jiminy Cricket who was named after the expression, not the other way around.
Continuity Carl's house starts flying at the moment when he releases the balloons from the chimney; assuming that all balloons were already inflated and stored inside the house, this should have made the house float hours before already, regardless of whether they are inside or outside the house. However, it appears the balloons were in a giant sack in the backyard, and could have either been tethered down securely, or compressed to reduce lift.
Continuity In the scene where Russell finds the lever to operate the house direction he moved it first towards right then to its left and again to its right and finally leaves it in the center and goes towards the window, but in the next shot its found positioning to its right.
Continuity In the shot where Carl notices his mail has arrived, he holds his cane in his left hand and reaches the mailbox. He places the cane to his left; in the next shot he picks up the mail and comes back, and the cane is not visible. Then in the shot afterward it is found to Carl's right side, when he speaks to the man in the black suit.
Continuity In the shot where young Carl is running with the balloon and stops near a house listening to a sound. His shadow is at his right side and after he turn to his right the shadow is in front, but the next shot shows the shadow falls behind him not in front.
Continuity After Russell frees himself from being tied up, he was seen standing on the hose nozzle. However, he was then found clinging onto the nozzle when he was dragged across the front of the airship. Right after that, a far view of Russell showed him standing on the nozzle again.
Continuity When they are flying and Russell speaks of the cumulonimbus cloud, Frederickson turns his hearing aid off by turning the knob forward. When the lightning strikes, he turns it back on... by turning the knob forward.
Continuity In the scene where Carl and Ellie paint the mailbox it can be seen that Carl's hand spoils the paint with his hands paint making a mark on the mailbox to which Ellie reciprocates and make a mark of her hand. In the later scenes its found that mark made by Ellie is rotated clockwise.
Continuity When the house first rises, breaking free of its foundation, the front porch is clearly empty. Yet Russell appears later in the far right corner. This is explained by Russell later when he says he crawled under the porch chasing a "snipe". Apparently he hung on to something underneath the porch and crawled up later. In the short film George & A.J. (2009) it is revealed that Russell braced himself underneath Carl's house when it took off in the same way that Woody held onto Sid's milk crate when Sid picked it up in Toy Story (1995). However, in the Up movie several shots show the complete underside of the house as it flies off and Russell is clearly not there (or on the porch).
Continuity When the construction workers are around Carl's house, the letters in the mailbox change locations between the shots of Carl walking up to it.
Miscellaneous When young Carl breaks his arm, the ambulance he rides in has a modern electronic siren rather than a mechanical siren which an emergency vehicle of the 1930s would have used.
Continuity The door to the house has a different number of outside door knobs through out the film. The number varies from 3 to 4.
WILHELM SCREAM: As the dogs fall off the cliff into the river below while chasing Carl, Russell, Kevin, and Dug.
Carl and Russell's hometown at the end is Oakland, California. We see Oakland landmarks and the Fox Oakland Theatre (showing Star Wars: Episode IV - A New Hope (1977)) and Fenton's Creamery. The Fenton's Ice Creamery actually and has two locations, the other in Vacaville, CA, on East Monte Vista Avenue. Both locations are close to Pixar's headquarters in Emeryville, CA. There is also an express version of the creamery in Oakland International Airport to eat while you wait to catch a plane or if you just flew in. Fenton's did not have to pay to have it in there; Disney and Pixar put it in the film for free.
All of the dogs except for Dug are named after letters of the Greek alphabet (Alpha, Beta, Gamma, etc) although this could relate to rankings in a dog pack, where the lead male is known as the Alpha, then Beta and so on. This is supported by the fact that when Dug puts Alpha in the Cone of Shame, all the other dogs begin referring to Dug as Alpha. The voices of both Dug and Alpha are performed by the same actor, Bob Peterson. The three main dog characters, Alpha, Beta, and Gamma, as well as being named for the Ancient Greek alphabet, also reference three classes of workers in Aldous Huxley's novel 'Brave New World'. It is also worth noting that Muntz's "chef" is a dog named Epsilon, another class of worker from 'Brave New World'.
In the closing credits, many of the photos have the same theme as the title of the corresponding crew member, i.e. Music By shows Carl playing water glasses and Russell playing a trumpet, Story Supervisor shows Carl telling a story around the campfire, Film Editor shows Carl and Russell in front of a movie theater showing Star Wars, Production Designer shows Dug and Carl designing pictures on the sidewalk, Technical Director shows Carl dangling a computer mouse, Production Manager shows many puppies had been produced, Supervising Animator shows Dug in three stop frames of animation, Photography, Camera, and Lighting show photo booth photos of Carl and Russell, Shading Art Director shows them doing shadow puppets, and so on.
Inside the newly-updated photo album, one of the pictures of the couple is of them in a car, looking over their shoulders (Carl in the driver's seat). The pose they are in, as well as the car is a recreation of a famous ghost photo. In the picture, the man was posing for his brand new car, and in the passenger seat was the ghostly image of his mother.
When Russell flies past the airship using his balloons and the leaf-blower, we briefly see several of Charles Muntz's dogs playing poker at a card table. This is a tribute to the famous "Dogs Playing Poker" series of paintings by Cassius Marcellus Coolidge.
When the dogs start attacking Russell with airplanes at the end, this aerial fight literally becomes a 'dogfight'. Also, the dogs refer to each other with "Grey leader", "Grey One", "Grey Two", etc. This is a nod to Star Wars: Episode IV - A New Hope (1977) (where pilots referred to each other with Red Leader, Red One, etc.), and it also jokingly refers to the myth that dogs cannot see colors, only black, white and shades of gray.
Muntz is the fifth animated Disney villain to fall to his death (following the Wicked Queen [Snow White and the Seven Dwarfs (1937)], Ratigan [The Great Mouse Detective (1986)], McLeach [The Rescuers Down Under (1990)], Gaston [Beauty and the Beast (1991)], and Frollo [The Hunchback of Notre Dame (1996)]). He is the first Pixar villain to do so. It's also noteworthy that Lucifer the cat [Cinderella (1950)] fell to his apparent death but was brought back in the direct-to-video sequel, Malificent [Sleeping Beauty (1959)] falls after being mortally wounded with a sword, and Clayton [Tarzan (1999)] falls after fighting Tarzan, but actually dies by being hanged by vines. Many death scenes were proposed for Charles Muntz; in one of them, his obsession with catching Kevin took him inside the dreaded labyrinth against his own recommendation, where he would eventually get lost and die (much like Jack Nicholson's character in The Shining (1980)). As the animators wanted to keep the climax situated in the air, they considered that Muntz be lured into Carl's house by Kevin, and then die as the house fell off the zeppelin with him still in it. However, they did not want to associate the house, which symbolized Elly, with a violent death. Another ending that almost made it was Muntz getting tangled into some balloons and getting lifted away, instead of falling down. But this did not give a proper closure to the character. In the end, the directors decided that this was Carl's story, and Muntz' ending was therefore to be kept simple.
When Carl's house first takes off and when the camera zooms out from the parking lot at the end, Pixar's trademark Pizza Planet truck introduced in Toy Story (1995) can be seen.
On the official movie website, there is a video clip titled "Ditch 'Em". The same scene in the film has music playing, while the clip on the site has only voices and sound effects.
Carl's summons notice has the number 94070 - the postcode of San Carlos, where producer Brad Lewis was once the mayor.
One of the construction machines reads L 415-72, which is art director Lou Romano's birthday.
On the DVD cover and in commercials, the dogs appear to be flying Curtiss F9C-2 Sparrowhawk airship-launched fighters. US Navy airships such as the Macon and the Akron based at Moffet Naval Airstation between the first and second World Wars were actually designed to carry and launch these fighters.
A subplot involving Carl keeping one of Kevin's eggs (Which could reverse the aging process) from Charles Muntz was conceived in the early stages of production, but never scripted, due to it being (in director Pete Docter's words) "too bizarre".
When Carl is watching television, and is interrupted by Russell knocking at the door, he is watching a home shopping channel. This particular program has become a well-known blooper video of a pitchman making a gaff in which he describes a picture of a horse, except the picture he is describing is actually that of a moth.
Nurse AJ is the first ever Pixar character with a mullet.
The second Pixar film to be given a PG rating, the first being The Incredibles (2004).
The rifle that Charles Muntz uses is an 1874 Sharps, a very popular model with buffalo hunters of the American Wild West, and the procedure he uses to load, aim, and fire the weapon is accurate. (His use of shot-shells in a long-range rifle, however, is questionable at best.)
The only Best Picture nominee to have just 2 letters in the title. However, the record for shortest Best Picture nominee title belongs to the film Z (1969), a 1969 nominee.
The first Pixar film since Finding Nemo (2003) not to be presented in the 2.35:1 aspect ratio.
The second animated film to be nominated for an Academy Award for Best Picture. The first was Beauty and the Beast (1991). However, it is the first Disney/Pixar film to do so
First film to be nominated for Academy Awards for both Best Picture and Best Animated Feature.
First film produced by Pixar to be shown in 3D.
Pixar is known (at least by devoted Pixar fans) for referring to a character in their next movie to come out in their most recent one. A stuffed Lotso bear (from Toy Story 3 (2010)) appears (along with the ball from Luxo Jr. (1986) and the plane from Toy Story (1995)) in the room of a little girl Carl passes when his house first takes off.
One of Carl's brochures for Paradise Falls has an image based on the Sunny Miami figurine from Knick Knack (1989).
The tepui (flat mountains) and waterfalls similar to Paradise Falls are actually found in Venezuela. The country's Angel Falls is the highest waterfall in the world.
During pre-production of the film, director Pete Docter looked up to Disney veteran animators Frank Thomas, Ollie Johnston, and Joe Grant for inspiration. Docter stated that the film reflects the friendship he shared with these three talented animators before their passing as well as wanting to learn what they went through during their years working for Walt Disney and soon after.
Co-director/co-writer Bob Peterson stated that Dug's line "I have just met you, and I love you," was inspired by a quote from a small child that he met when he was a camp counselor in the 1980s.
A code title used during production was "Helium".
When a younger Charles Muntz speaks to a large audience that he will return with the beast alive, everyone is wearing a hat. What the viewer can't see, however, is that he is speaking to a literal "Sea of Hats". There are no people under those hats (DVD director's commentary).
Russell is Pixar's first Japanese/Asian-American character voiced by an Asian-American actor, Jordan Nagai.
Film debut of Jordan Nagai, who voices Russell. Originally, his older brother Hunter was auditioning for the part, and Nagai simply came along with him. About 400 children had showed up for the auditions, but Nagai stood out because he would not stop talking. Director Pete Docter later said that "as soon as Jordan's voice came on we started smiling because he is appealing and innocent and cute and different from what I was initially thinking."
Dug's 'point' pose, where his entire tail, back, and head is in a perfectly straight line, is an homage to the identical pose that Mickey's dog Pluto often makes. Dug also shares a similar color scheme to Pluto.
Preceded by the short Partly Cloudy (2009) in some theaters.
When we first meet Carl as a child, the left side of his collar is sticking out of his vest while the right side of his collar is tucked into his vest. When we first meet Russell, the left side of his collar is tucked under his neckerchief and the right side is sticking out.
The iconic, slightly out-of-perspective drawing of the house sitting by the falls is an homage to the style of Mary Blair, the artist credited with bringing the modern art look to Disney animation.
The term 'A113' is the number of the courtroom, and can be found on the gold sign Carl sits next to while waiting to be called (Courtroom A113). A113 is a frequent Pixar in-joke based on one of the room numbers for the animation program at Cal Arts.
Pete Docter, the director, provided most of Kevin's vocalizations.
Carl Fredricksen's face and gruff personality are based on Spencer Tracy and Walter Matthau.
As per Pixar tradition, John Ratzenberger once again provides a voice in the movie, making him the only actor to do a voice in every Pixar film.
Up's musical score has become the 9th musical score (and the 3rd from an animated film) to win the Grammy, Golden Globe, and Academy Award for "Best Original Score". The other previous winners are Butch Cassidy and the Sundance Kid (1969), Jaws (1975), Star Wars: Episode IV - A New Hope (1977), E.T. the Extra-Terrestrial (1982), Beauty and the Beast (1991), Aladdin (1992), The English Patient (1996), and The Lord of the Rings: The Return of the King (2003).
Carl wears the same grape soda pin that was featured in the Buzz Lightyear commercial in Toy Story (1995).
All characters are based upon circles and rectangles, except for the villains who are triangles. Not only are Carl and Ellie based on squares and circles, but objects around them are based on their shapes, like their chairs and picture frames. When they both appear in a photograph, the frame is both circle and square.
Russell's Wilderness Explorer sash has several in-jokes and tributes. The most obvious is a Luxo Jr. (1986) ball, which can also be seen on the floor of the room of a girl watching Carl's house float by. One badge has a hamburger with a candle in it. This is a nod to Merritt Bakery in Oakland - which creates cakes in that shape - a favorite hangout of director Pete Docter and producer Jonas Rivera. Another badge is a tribute to 2-D animation, showing a perforated paper that is used by 2D animators to line up their drawings correctly. He also has badges for First Aid and Second Aid, which may be a reference to a short on the Up website where Russell struggles to apply bandages to Carl. Yet another badge depicts a multicolored pinwheel - the "hang" icon of Apple's Mac OS X operating system, equivalent to the Windows hourglass icon. Several of these badges are shown in the credits. An additional tribute to Apple and Steve Jobs (former CEO of Pixar) shows Russell trying to teach Carl how to use a computer. The font used for the numbers on Carl's alarm clock is the "Chicago" font, one of the first fonts designed for the Macintosh. Steve Jobs, former Pixar CEO, also spearheaded the original Macintosh project at Apple.
When Carl and Ellie go picnicking, their destination is a spot under the same tree from A Bug's Life (1998).
The very first animated film, as well as the first 3-D film, ever to open the Cannes Film Festival. When the film was over, the Festival audience remained completely silent. During a panel at the 2011 D23 Expo, executive producer John Lasseter said that it was actress Tilda Swinton who broke the silence by applauding and leading the audience in a standing ovation.
The villain Charles Muntz is named after Charles Mintz, the Universal Pictures executive who in 1928 stole Walt Disney's production rights to his highly-successful "Oswald the Lucky Rabbit" cartoon series. This led Walt Disney to create Mickey Mouse, who soon eclipsed Oswald in popularity.
In June 2009, 10-year-old Colby Curtin from Huntington Beach, California, was suffering from the final stages of terminal vascular cancer. Her dying wish was to live long enough to see Up (2009). Unfortunately, Colby was too sick to leave home and her family feared she would die without seeing the film. A family friend contacted Pixar, and a private screening was arranged for Colby. The company flew an employee with a DVD copy of "Up", along with some tie-in merchandise from the film. Colby couldn't see the screen because the pain kept her eyes closed, so her mother gave her a play-by-play of the film. Seven hours after viewing the film, Colby passed away.
If Carl's house was approximately 1600 square feet, and the average house weighs between 60-100 pounds per square foot, it weighs 120,000 pounds. If the average helium balloon can carry .009 pounds (or 4.63 grams), it would take 12,658,392 balloons to lift his house off the ground. (20,622 balloons appear on the house when it first lifts off.)
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