CNN Sanjay Gupta MD September 21, 2013 20:51:00
The fighting takes place in the ring. but when the cameras stop rolling, dash fights for something quite real. >> i've had tourette's syndrome since i was 6 years old. part of the reasons i became an actor was probably because i was experienced so well in hiding it that i was acting all the time. >> when dash is acting, you barely notice his tourette's. but look what happens when he loses that focus or he becomes distracted. tourette's is a neurological disorder that causes repetitivin voluntary movements, even sounds sometimes that are called ticks. >> growing up in new york city can be a ver...