Gold

Filming was ravaged by sandstorms to the point filming was almost shut down for a day. Until the idea of strapping a camera to one of the cinematographers backs and "getting the shots" was better than using a fan. Multiple shots of sandstorms in the movie were actual sandstorms filmed by a cinematographer.

When Efron's character is stabbed by a tree after the dust storm, the branch is stuck in his right side. In a following shot it has moved to his left, and subsequently goes back to the right. The stick then teleports to the other side again.