When I was a very young boy I remember being so afraid of falling asleep that I used to bring a small bottle of water to bed with me. When my eyes began to become dry it would feel like there was sand in them. I would sprinkle some water in them so I could stay awake. I'm not sure what I was so afraid of. This video reminds me about it.
(For the best viewing of this video go full screen and turn the sound up loud.)