An Australian diver hunting for crayfish thought it would be a good idea to avoid crocodiles by swimming in a reef of Princess Charlotte Bay. He wasn't bothered by any crocs, but came face-to-face with a 6-foot long hammerhead shark! The guy used his GoPro camera to shove the shark away but it came charging back. After beating the predator back two more times with his GoPro, the shark finally swam away. The diver said it was the largest hammerhead shark he's ever witnessed in his life.