The World’s Most Dangerous Deep-Water Dive. William Trubridge just broke the world record for deepest free dive. He dove 288 feet underwater using nothing, no equipment. You can see how black the water gets as he dives deeper and deeper into the abyss below. It’s beautiful, terrifying, thrilling, and utterly captivating. Especially considering I can barely get myself down to the bottom of a 12-feet deep diving well. (To put things in perspective: most college diving wells are 24 ft. deep. This guy went down 12 – that’s right, 12 – diving wells, back-to-back-to-back, using nothing. And he lived to tell about it.