Interesting article on Spin's website. They interviewed Dave Markey:
http://www.spin.com/articles/inside-...epic-1991-tour
At the time, Madonna's Truth or Dare was in theaters — this big cultural moment. So we decided to reenact scenes and we had the idea where Kurt, pretending to be Kevin Costner, meets Madonna backstage and he says, "You guys were really neat." But he had this champagne bottle and decided to fling it around the room. That was an add-on. It wasn't rehearsed. He didn't break it but everyone thought he was going to smash it through a window. Dave and Kim ran out of the room as if it was going to be set on fire. It was hilarious.