That came from a 1980s science fiction film named Krull. The sunglasses thing is also from it.
You know what's worse, creators Matt Stone and Trey Parker are being threatened with their lives [http://artsbeat.blogs.nytimes.com/2010/04/22/south-park-episode-is-altered-after-muslim-groups-warning/] over an episode of South Park parodying Mohamed and Islam by a Jihadist group.