Deliberate "mistake": Fritz rescues the mud-trapped zebra and Roberta rides it across the island to the tree house, then again later in the race. Zebras, however, cannot be domesticated or ridden. To film these scenes, Disney & Co. painted a white horse with zebra stripes.

Revealing: During Fritz's fight with the giant anaconda in the swamp, James MacArthur's stunt double becomes apparent by virtue of a bald spot showing on the back of his head.