I happen to come upon this movie which I haven't seen in years through Netflix. In short, the movie is about a romance novelist named Joan Wilder who goes on a treasure hunt to find a jewel to trade for her kidnapped sister. In the movie, she used examples from her novels to assist her in the hunt (remind you of anyone?). This scene reminded me of the Caskett's treasure hunt in the cemetery.  A deja vue scene was when Joan's partner went up to the door of a drug runner in a small village to ask where they could find a car but the drug runner pointed a gun in his face and told him to hit the road. The drug runner then invited them in when he overheard that it was Joan Wilder at the door (big fan of her novels). Was this the scene that inspired the El Calderon scene? Don't know but I got a kick out of it.

Yes, I've seen Jewel of the Nile as well.