In ten years, he had tried all sorts of dangerous extreme sports which had built up Shi Yan’s extraordinarily strong body. Hundreds of near-death experiences made his nerves as hard as steel. He once joked that he was the man who was the closest to the Grim Reaper.
The blue-hole exploration in the Bahamas was the most dangerous extreme sport he ever took part in. Some of these blue-holes were hundreds of meters deep, while some were complex like mazes. What's more, every little move could stir the sand up on the bottom of the cave. No matter how bright your light was, you wouldn’t be able to see anything in front of you.