By CLARENCE E. HILL JR. JACKSONVILLE, Fla. — You called him "Bullet."But they called Bob Hayes "Crow."Long before he became the world’s fastest human by winning double gold medals at the 1964 Olympics in Tokyo — and well before he came to Dallas to play for the Cowboys, earning a Super Bowl ring and in the process changing the game — he was "Crow."On the brink of his posthumous induction into the Pro Football Hall of Fame, his former high school teammates and childhood friends shared their memories of Hayes as a youth.Not of the world-renowned "Bullet" Bob Hayes, who is still the only man in history to win an Olympic gold medal and a Super Bowl ring and was so fast that opposing teams had to revise how to play zone defenses.