I've heard that when necessity strikes ordinary people can suddenly perform superhuman strengths. Such is the case with an Islamorada, FL man who decided to take on a shark, beating its head to get the animal to release his prized pooch, Jake, from the jaws of death. The five-foot-long creature already had almost the entire 14-pound Rat Terrier in its mouth . . . but thankfully, there's a happy ending.