I remember this movie (or maybe it was an episode of a show). The only parts that I remember are there being a sandstorm in a desert, I believe there was something with quicksand, some mysterious old man, and this cave with shining crystals that talked and said “goodbye”. I had originally thought that it was a Speed Racer episode, but I couldn’t find any episodes that matched the description.
Sounds a lot like the intro to Aladdin.