Continuity mistake: When Joan meets The Jewel for the first time in the room where Omar is holding him prisoner, Omar enters and greets Joan. As he leaves, the shot shows Joan with her back turned to Omar and Omar is heard off-camera saying Joan looks pale. How does Omar know how Joan looks if he doesn't see her, and there is no mirror on the side of the room where they are chatting?
Continuity mistake: The train is about to enter a tunnel and a "bump" is heard. We immediately discover it's Ralph crashed against the side of a tunnel. Problem is the camel has magically managed to face the opposite way and, what's even more magical, it's now been safely tied up by a big fat rope.