 CONT: About 53 min into the movie Imhotep is flipping an hour glass  over in front of Alex. When the glass has been turned upside down  Imhoteps hand is flat with his thumb on the left side of the snake  and fingers on the right side, but once he sets the hour glass down  on the table his hand has instantly flipped over to the other side  of the snake as if he was just going to pick up the hour glass.