Don't you ever turn your back on me when I'm talking. CITIGROUP SENIOR EXECUTIVE JAMIE DIMON TO THE COMPANY'S VICE CHAIRMAN, DERYCK MAUGHAN, AT A BLACK-TIE DINNER. WHEN MAUGHAN TURNED AWAY FROM HIM, DIMON GRABBED HIM BY THE SHOULDERS AND SPUN HIM AROUND, POPPING A BUTTON FROM THE LAPEL OF HIS DINNER JACKET