 FAKE: When Joe makes his first appearance, and starts poking around  the wagons containing the lions, watch the background carefully.  Immediately to the left of Joe, between him and the far left wagon  is a large bush. Just after Joe shoves the wagon the first time a  light suddenly shines on the bush (presumably someone had  repositioned a spotlight between shots) and from that point on you  can see the reflection of Joe and the wagon reflected in what  appears to be an unpainted area of the glass painting behind him.