That looks like a lot of fun except for the not being able to breathe part, which kind of ruins it. I also notice there is no film of him returning to the surface, so I salute his sacrifice for my entertainment.

Y-40 "The Deep Joy" pool first opened on 5 June 2014 and was designed by architect Emanuele Boaretto. It is 40 metres (131 ft) deep, making it the deepest pool in the world. It contains 4,300 cubic metres (1,136,000 US gal) of thermal water kept at a temperature of 32–34 °C (90–93 °F).[4] The pool features underwater caves and a suspended, transparent, underwater tunnel for guests to walk through.

Moving this video to Mordhaus's personal queue. It failed to receive enough votes to get sifted up to the front page within 2 days.

Free divers are nuts. They are some of the fittest athletes on the planet, but they put their bodies through unbelievable stress.

I have a tonne of respect for them, but I'd never do it.

Alexey Molchanov's World Record Free Dive to 130m has been added as a related post - related requested by Mordhaus on that post.

*promote

Self promoting this video and sending it back into the queue for one more try; last queued - promote requested by original submitter Mordhaus.