When he was 12 years old, Martin Pistorius was stricken by a mysterious neurological illness, known as Locked-in Syndrome. For the next ten years he was unable to move or speak.
Doctors, family, and carers believed he was unaware, however Martin was entirely cognisant but unable to let people know he could see, hear, and understand everything going on around him.
His memoir Ghost Boy was published in 2011. Earlier this year Rodney Ascher's documentary, also called Ghost Boy, was released and won the Visions Audience Award at the SXSW Film and Television Festival.
Martin joins Jim to discuss the documentary and his experience of being 'locked-in'.
When Martin Pistorius was 12, he was stricken by a mysterious neurological illness that rendered him unable to move or speak. Photo: Martin Pistorius