By the time Valentine's Day 1999 rolled around, the rivalry between "Stone Cold" Steve Austin and Vince McMahon had put WWE firmly ahead of WCW in the Monday Night Wars. It had dominated the company's television product for a year but the two had never had that one match that would define the program. That all changed when they clashed inside a steel cage in the main event of the St. Valentine's Day Massacre pay-per-view. Despite a solid undercard featuring quality performances from Ken Shamrock, Val Venis, Triple H and X-Pac, and a WWE Championship Last Man Standing match between The Rock and Mankind that again set the bar for violence in a title bout, all eyes were on the long-awaited showdown between Austin and McMahon. The Texas Rattlesnake punished McMahon, sending him falling from the top of the cage through a table at ringside, cracking his tailbone in the process. He systematically picked apart the Chairman of the Board and appeared poised to walk out of the cage victorious until the massive Big Show debuted, inadvertently helping Austin to a victory by sending him crashing through the cage. Not only is the show incredibly fun, as was the case with most of the pay-per-views from that period, it was also one that helped define the Attitude Era.