Boulder spinning on top of fountain.
<video controls autoplay loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/boulder_spinning_on_top_of_fountain.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
Previously:
https://www.homemadetools.net/forum/...220#post116000
https://www.homemadetools.net/forum/...811#post140278