Watch the video below
The stunning feat of diving has been recorded on video and leave one watch it in awe and fear. But for the French diver Guillame Néry it is thrill and adventure. How could he do it without oxygen - well Some free divers can hold their breath for more than 20 minutes.
The Dean's Blue Hole in the Bahamas is the second deepest underwater sink-hole in the world.
The video shown below was filmed in 2010 by the Frenchman's girlfriend and fellow freediver Julie Gautier, but has been made public now.
If you like Hobby Shobbys, then please follow us on Facebook and Twitter