Cave diving horror stories - Sheck Exley was born on the first of April 1949. He began diving at the age of 16 and instantly fell in love with the extreme sport, a love that he would carry with him for the rest of his life. To some people Sheck was a timid, soft spoken high school algebra teacher at Suwannee High School in Live Oak, Florida, to most he was considered the world’s greatest cave diver and the best to have ever done it.