This week on Sound Effect , we listen back to stories of survivors. Silver Linings After leaving a Tacoma karaoke bar one night, Jason Padgett was mugged by two men. He suffered a concussion and developed post-traumatic stress disorder. He also became one of just a handful of people to develop a condition known as acquired savant syndrome. Now he’s a mathematical genius. Padgett talks about why , if he could somehow go back in time, he would choose to suffer the attack all over again. A Change