In May when a Chevron tugboat capsized off the coast of Nigeria in heavy ocean swells, rescue teams thought all 12 men aboard had drowned.

The moment that divers reached Harrison Okene, the lone survivor in the wreck. (Image source: LiveLeak

And as rescue diver Jed Chamberlain reached out to a hand in the murky water, he never expected it to squeeze back. Incredibly, 29-year-old Harrison Okene had survived 100-feet underwater for two and a half days.

Chamberlain later told his team that it was one of his most terrifying moments underwater.

Okene happened to be on the toilet when the boat capsized. As it sank, he managed to find a four-square-foot air pocket within the boat, and stayed there in the pitch black dark, drinking Coca-Cola.

Okene's rescuer gave him a helmet providing a combination of oxygen and helium, he was immediately taken to a decompression chamber where he was held for sixty hours so his body pressure could return to normal.