"Snorkel Test"
Kinda dark but if you look closely at the topless guy sitting bent forwards, he's wearing a snorkel connected to an inverted bottle that's been cut open. Apparently these divers always prep themselves the night before a big dive with the "snorkel test", which involves pouring copious amounts of alcohol down the breathing tube. The local poison of choice is of course, arak, a fermented palm wine.