Horror moment four men cling to boat on edge of 130ft dam as rescuers race against time to save them

THIS is the terrifying moment four men clung to a stranded boat as it hung on the edge of a 130ft drop. Dramatic footage shows the men gripping onto the ski-boat high above the dam spill way, as foaming water surges beneath. The incredible incident took place on the Vaal River in Standerton, a town…