Swimmers were forced to scramble out of the water after they spotted an apex predator on the hunt. The 8-foot hammerhead was caught on camera chasing down a large fish at a sandbar in the Keys. Some swimmers near their boat stopped to watch the shark thrashing through the water before it took a sudden turn in their direction. “It didn’t get real weird until it took a hard right turn towards us and that’s when we all decided to scatter,” said Cou…