I wanted to post yesterday on this but couldn't. But, on YouTube there is a video made by a young man with autism. The point of the video is to show how overstimulation effects him. However, when I watched it, it was dead on a great example of how racing thoughts are in my head.

In the video he uses a clip from the old "Transformers" cartoon t.v. show of the 80s. First he shows it normally, then he shows it with a ton of background noise. A friend of mine who has an autistic son showed it to me a few years ago, so I don't know if it's still there. I will look up a link later when I'm able to.