Comp has some really good Spintron video's showing how the springs spin, and dance. Heck you want to see something scary watch a push rod at 10,000 RPM when you shift..
We spent a bunch of time on the spintron when we built our A and B class engines. We ran those engines at almost 7800 RPM. At one point we could watch the bottom of the valve spring jump up off the spring seat quite a bit.