Revealing mistake: The volcano backdrop is rather coarsely painted, thus quite a contrast to the many other impressive landscape shots. (00:28:55)
Revealing mistake: While Noro, a member of a shoeless society, is doing his uphill training you get a glimpse of his shoes, in spite of all efforts to hide his feet in the grass. (00:53:30)
Revealing mistake: When the last of the competitors steals an egg from a bird's nest you can see that the bird's legs are tied. (01:17:00)