Angelo “Quack Quack” Ruggiero rose to the top of the New York underworld with John Gotti — until he and his big mouth helped bring the mob to its knees. Ruggiero was a psychotic mobster who would complain to anyone willing to listen about his issues with the leaders of the Gambino family and openly discuss whatever criminal operation he had going on at the time. He eventually got the nickname “Quack Quack” for his tendency to talk endlessly. He once threatened to throw a pair of victims to man-eating sharks he falsely claimed to keep in his pool.