Time to spare a thought for Saman Kunan who lost his life while doing this...
A former Thai navy diver has died while taking part in efforts to rescue 12 boys and their football coach trapped in a flooded cave in Thailand.
Petty Officer Saman Kunan lost consciousness on his way out of the Tham Luang cave complex, where he had been delivering air tanks.
The death of Saman - a highly trained diver - on Thursday underscored the danger of moving from the chamber to mouth of the cave, and raised serious doubts about the safety of bringing the boys out through the cramped, flooded passageways.
The diver died after losing consciousness in one of the passageways, said Passakorn Boonyaluck, deputy governor of the Chiang Rai region, where the cave is situated.
"His job was to deliver oxygen. He did not have enough on his way back," Mr Passakorn said.
He said that Saman's dive partner tried to revive him but could not, and his body was brought out of the cave.
RIP...