There was some ECW show I watched, I wanna say it was Hostile City Showdown '95 or '96 but i could be mistaken.
The show starts with the Eliminators, who are feuding with the Gangstas,who I believe they lost the belts to. They are pretty angry about it and cut a promo on them in the ring, and refuse to leave and let the show start. Then you hear the Gangsta's music hit, and they come to the ring to fight with the Eliminators. The whole locker room comes out to keep them apart until both teams leave.
A match starts with Supernova and some other jobber and immediatley the eliminators come back and destroy those jobbers and the gangstas come back and this time the fight is much longer and bloodier and any jobbers trying to seperate them get destroyed.
I never seen such hostile disregard for a formatted wrestling show ever. The crowd was whipped into a bloodthirsty frenzy by this.