So at the end of Raiders, the Germans open the ark and there is dust/sand in the ark. They are surprised, but Indy seems to have a smug grin. This could mean he is pleased to see them disappointed, but I have always wondered if it was meant to imply the Jones had at some point already opened the ark and removed the tablets. Similar to his bag of sand trick in the beginning of the movie. I doubt it, but anyone have any insights on this?