
Continuity mistake: When Mr Fredrickson opens the door there are 4 locks on the front door looking from the outside in. Next scene and consequent scenes there are only 3. (00:12:35)

Directed by: Pete Docter, Bob Peterson
Starring: Christopher Plummer, John Ratzenberger, Edward Asner, Jordan Nagai

Continuity mistake: When Mr Fredrickson opens the door there are 4 locks on the front door looking from the outside in. Next scene and consequent scenes there are only 3. (00:12:35)
Carl: Russell, if you don't get up, the tigers will eat you.
Russell: There aren't any tigers in South America. Zoology.

Trivia: When Carl's house begins to lift and the little girl looks out her window, the Luxo ball from Pixar's other films is seen in her room.
Chosen answer: Carl and Ellie have two dramatically different personalities. Carl is more conservative, more reserved, a tender heart covered by a tough exterior which Ellie is able to break through, but which seems to recalcify after she dies. Ellie, on the other hand, is the sweet free spirit, rambunctious and adventurous. Throughout the film, each one conforms to the other until they ultimately blend into one beautiful unit. I think the makers of the film were trying to show that their respective personalities were a product of their upbringing, and reflected in the reactions of their families - hers larger, more fun, and more "hick" (we hear gunshots, for Pete's sake), and his more reserved, formal and patrician.
Michael Albert