Other 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? (00:36:35)
Other mistake: When Jack shoots the plane, lots of pieces of wood fly out. Where did the wood come from? The plane is all metal.