and apparently he was a fake. south africans are outraged. davey residents are outraged they missed out on a key part of the memorial. >> reporter: he seemed to be gesturing with authority, signing to keep pace with the speaker. >> side by side, dreaming the same dream. >> reporter: but this sign language interpreter at nelson mandela's memorial, was apparently a fake according to the deaf community in south africa. they claim he had no training, the signs he used were not african language signing. and he never used facial expressions. the federation says there are established signs for famous people in south africa. >> i think he even signed help, because this is a sign for help. or help someone, so who is being helped, it is not known, because the speaker has said the former president thabo mbeki.