There's these two French Legionnaires in the desert, and they've been separated from their unit and are lost. They've been wandering for several days without food and water, and are nearly resigned to the fact that they will soon die from dehydration, when as they reach the top of a sand dune, they see a big, bustling market laid out before them.
Naturally, they can't believe their eyes and think it's a mirage, but as they draw closer, they can hear the stallholders' cries, and they eventually reach the market and realize that it's really there.