Horrors on Instagram: "After retiring in 1990, NFL legend Mike Webster—a Hall of Fame center for the Pittsburgh Steelers—began to unravel in disturbing ways. Friends and family described erratic behavior: he once urinated in an oven, used a stun gun to shock himself to sleep, and even glued his rotting teeth back into place. His decline shocked those who had once seen him as one of football’s toughest and most dependable players. By the late 1990s, Webster was homeless at times, living out of hi