The Columbine High School massacre was a school shooting and bombing that occurred on April 20, 1999, at Columbine High School in Columbine, Colorado, United States. The perpetrators, twelfth grade (senior) students Eric Harris and Dylan Klebold, murdered 12 students and one teacher. Ten students were killed in the school library, where the pair subsequently committed suicide. 21 additional people were injured with gunshots and gunfire was also exchanged with the police. Another three people were injured trying to escape the school.
The Rock's popularity continued to grow and audiences still cheered for him even though he was a heel. He then lost the title rematch against Stone Cold Steve Austin at Backlash: In Your House after he was betrayed by Shane McMahon, turning him face again and starting a feud with Triple H, The Undertaker and The Corporate Ministry.
On April 29, 1999, WWF aired the pilot episode of SmackDown!, a term derived from one of The Rock's catchphrases. In the episode, The Rock continued his feud with The Corporate Ministry. This led to a match with Triple H, at Over the Edge, which The Rock won, and a match for the WWF Championship against The Undertaker, at King of the Ring, which The Rock lost. The Rock then lost a number one contender's match to Triple H, at Fully Loaded, after interference from "Mr. Ass" Billy Gunn.