Watch the crowd. It grows restless as the air cools. A word is passed, then they begin moving like hooved beasts. Inexorably trampling the dry dust in the darkness, weaving their way across the open sands.
If you glance around yourself and speak these words: "Hey where did everybody go?' Then you look up and see a red glow in the distance and hear the shout of thousands of primal revelers rising across the desert like a single drunken beast, then you've already missed it.