Terrifying on Instagram: "On the morning of Tuesday, May 28, 2013, the tugboat Jascon-4 was performing a routine anchor-handling operation for the Chevron oil company approximately 20 nautical miles off the coast of Escravos, Nigeria. During the maneuver, the 90-foot vessel was struck by a powerful, unexpected wave that caused it to capsize and sink rapidly to the seabed approximately 100 feet (30 meters) below. Of the 12 crew members on board, 29-year-old cook Harrison Okene was in the bathroom