The original was a bit rough, but I re-shot it today, and made some alterations to the flow of it. to make it an easier watch.
This is one of the beautifully elegant physics experiments that anybody can do at home, pretty much cost-free.
Apologies to Matt Damon for the use of fresh water. It was only a bit.
Will expand this post at some point for a deeper explanation with some equations, but wanted to share.