Obsidian Generator

It's probably not worth doing, but I think I found an endless obsidian maker. Usually, I use the bottomless water bucket I get from the angler's 15th quest to dump on lava pools to get my obsidian. This time, I got the bottomless lava bucket pretty early, so I decided to dump it on a large water pool. I had an obsidian rose, so I wasn't taking much in the way of damage. With all my mining gear, I made 200 obsidian in just a handful of seconds, and as far as I can tell, the water level didn't go down at all. I didn't clear out all the obsidian, I just mined straight down until the lava was gone. The obsidian didn't disappear (because it was forming as fast as I could mine it. The water level didn't go down. Just the lava did. When it was gone, I dumped some more and did it again. Way more obsidian than I can use in about 30 seconds, and the water level never budged.