I am always amazed at this phenomena, and have wondered if it is the cause of the Moses and 'burning bush' story. I would imagine that if you were half starved, dying of thirst and scorched by the blistering sun in the desert, then coming across something like this which was not a hallucination might spark off some pretty wild theories in your fevered mind.
There is a tree just around the corner from us which - for the past two weeks or more - has been releasing clouds of white, fluffy seeds into the air, and sometimes they are so thick that it looks like a snow-storm. I tried to take pictures of it, but they do not show it to full effect and it looks more like a bad print.
I sort of cannot understand how one tree can produce so much stuff, day and night, for so long. I know it is all very light and fluffy, but I have never known a year like this for floating and drifting tree seed. It is coming in through our windows and forming piles in corners. The streets are covered in it, and it is still coming. I like it.