Well, not sand, of course. I was just trying to give an example...
Think more, like, Superman opening - http://www.youtube.com/watch?v=1qHDWdGPomw
You see how those letters disappear with a little visual effect? What if every line in the opening crawl would do the same but backwards. At first it's kind of blurry but then you can see it clearly.
Do you get the idea?