Just because you can't see an injury doesn't mean it's not there. Studies show that one in sixty people live with a permanent brain injury, which can lead to a lifelong struggle with anxiety, depression and PTSD. In this special case file, Canterbury Park Race Ambassador Mark Irving shares his story as a former professional jockey with over 1000 wins, whose career came to a halt after his 9th unconscious concussion. Host Roshini Rajkumar and Irving explore the highs and lows of horse racing, the long-term effects of traumatic brain injuries and the power of horses to bring peace, comfort and healing.