Gus: I think it's a box.
Shawn: Secret catacombs underneath the building like in National Treasure?
Gus: Shame on you for knowing that. Referencing National Treasure (2004), which was directed by Jon Turteltaub and produced by Jerry Bruckheimer. The film follows a man searching for the Knights Templar Treasure via a map found on the back of the Declaration of Independence.