Passage: Goldberg began acting while working for WCW in 1999. His appearance in Universal Soldier: The Return corresponded with him being featured in the music video. He was a special guest star on Hulk Hogan's Celebrity Championship Wrestling. On the show he showed the contestants his various power moves and also how to hit an opponent with a steel chair. He went on to host three seasons of the Speed Channel show Bullrun.

Question: What wrestling organization was Goldberg a part of when his acting career first started?
WCW