What makes you think that was real? From what I remember they terrorized the cafeteria, not the library at Columbine. And if you notice around 10:04am on the tape there was no muzzle flash, then around 10:06-07 there was muzzle flash. The Columbine shooting took place on April 20, 1999, not on May 1, 2001 as stated on the video. According to the list here [
http://www.infoplease.com/ipa/A0777958.html ] there was never a school shooting on that date. The whole suicide scene was pretty comical as well.