"You'll also get reprises of implausible psychopaths with SA accents."
Yep, Ninja was playing himself apparently.
I decided against watching this movie when Die Antwoord were cast. Ninja is a thug and Yolandi has no discernible talent other than flashing her bush on stage. Happily Blomkamp discovered what a twat Ninja is during the filming and wrote him out of the end of the movie. Still, we didn't need a Short Circuit remake.