At the football game, Tim belittled the opposing fans by shouting names at them. When the stadium security guard came around, he told Tim to have a good time in the stands, but to not start any trouble. Tim replied, "No trouble, no trouble, Barney Rubble." Tim was creating Barney Rubble trouble because he gave the security guard the impression that he didn't mean to start any trouble when he really did.
A metaphor for crack, (cocaine) birthed on the inner-city streets of Tacoma, WA during the rise and fall of the grunge and hip-hop eras in the early 1990s. Made popular in early 2005 by Seattle-based emo-rap group the Sensitivity Boosters, by their hit single "Barney Rubble."