On our trip to Onekama, Michigan, we found the sand dune that Bill Perkins played on as a kid. It is called "Angel's Slide" because from the lake, it looks like an angel.
It is a very steep dune. I videotaped me walking up and then coming down. I did not run because it is extremely difficult to hold a camera and keeping your balance on "Angel's Slide." I am glad I made it up and down the dune. But I will never do it again. It took the breath out of me!
I just found this video on youtube where someone is running down the dune.
Check it out.