Wow! I wonder how they discovered they could do that and still survive. You wouldn't get a second chance if
something went wrong, or they didn't see the advancing water in time.
That could get pretty scarey down in there. Looks to me like a pretty good chance for suicide.
A fascinating video. Thanks for posting. I've never heard of anybody doing anything like that before..
All of that, risking life and limb to get muscles Don't they have fish markets in their neighborhood Even if you don't have a fish market nearby, you can also get fresh muscles at your local gym :P