Revealing mistakes: 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) (V) 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 if flies off and Russell is clearly not there (or on the porch).
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