name. watch "an unreal dream" right here on cnn. the sign language interpreter at nelson mandela's memorial who has been called a fraud around the world for making up jibberish signs is blaming on it a skits friendic hallucination. he said he saw visions of angels flying into the event and that he's had a history of violent incidents in the past. in a separate interview with david mckenzie he defended his performance and said his schizophrenia was the inspiration for wanting to become an interpreter. >> what sort of disability do you have? >> me, i'm suffering from schizophrenic which is controllable and under -- i'm under treatment. >> can you show me some of the signs? >> what are you --