Ever wonder what you might do if you fell in? World Champion free diver Herbert Nitsch shows us one option in this video. Herbert holds the current world record in No Limits discipline at the depth of 214 meters (~702 feet) per AIDA. They don't say if that was in some particularly deep plumbing or not.
"Herbert Nitsch was in Japan for the 2010 Freediving World Championship in Okinawa. He didn't take part though. Here's a little insight to how he was spending his time."
There are some interesting watch ads involving free diving. Now if they can wire in a digital Nipponese loo we'll have it all covered!