This is Guillaume Néry, a French free-diver specialised in Constant Weight free-diving.
He broke the world record in 2002 at -87 meters in the Villefranche-sur-Mer harbour, in Alpes-Maritimes, France. Then, in 2004, he pushed the record to -96 meters in Saint-Leu, la Réunion. On September 6, 2006, he broke the record again at -109 meters in Nice (this record was subsequently broken by Herbert Nitsch at -112 meters in November 2007).
On July 3, 2008, he dove to -113 meters and set a new world record.
Read next: LOL. Genius: The Obama Plan