Yep....
Hah! I knew it.
I have been there, and I’ve never seen anything like that, what an amazing place. had a really good time camping there for three days with some friends. It gets very loud on Saturday night apparently.
https://www.youtube.com/watch?v=xbOXlDSCUDM
This is one of my favorite videos of the place, mostly for the music and the backward swimming fish and sinking bubbles!