Must Be Fireworks
When Brown was about a block away, the noises started. Initially, he assumed they were fireworks. He thought Harris must be pulling some senior prank. But then, the sounds got faster and sounded like gunfire. Brown ran, knocking on random doors until he finally found a telephone.
Source: YouTube
Within one hour, 18-year-old Harris and his 17-year-old accomplice Dylan Klebold – a fellow Columbine student and Brown’s friend since the first grade – were both dead. In that single hour, the duo murdered 12 students and one teacher in the deadliest school shooting in America (at the time).