My dad did this in the Perdenales once. Some kids came up with goggles on and said, "Hey mister, there's a big fish in this hole". Dad borrowed the goggles, went down, came up with his arm streaming blood. He tried once more before calling it quits. We went back the next day and he took a pair of welding gloves. The fish was still there and he brought it up. It was only a little one, probably 20ish pounds. When he went to throw it on the bank, it flopped and he lost his grip. You'd have thought that it was an alligator the way the people down stream started scrambling for the bank.
