There's also an evocation of "Fitzcarraldo, " as Carl and Russell tug the house through the jungle toward the falls -- a rather bland and barely effortful evocation, since the house still hovers above them -- and the reappearance of the adventurer Charles Muntz, who is far from the inspirational figure Carl and Ellie once found him to be.
WSJ: Pixar's 'Up' Fails to Soar | Video