Loved the Ancient Grail Knight...
...and his calm measured comment, "He chose....poorly." after Donovan drank from the golden chalice and slowly crumbled to dust, and later with the cave falling around him, he bids Indy good-bye with a slow final wave. His task was ended after centuries, faithful to the last, the Grail forever taken from the sight of man.
This film should have ended the series with the four heroes riding off into the sunset Indy and his father having drunk from the Grail riding also into immortality.