listen. >> we heard a loud bang, and then a few repetitive gunshots after that. so i headed back towards the rear exit. and i was campus and helped the s.w.a.t. team figure out oh to gut to the football field. >> how crazy was it people trying to get out of the library as soon as the shots rang out? >> it got pretty scary. people realized there was gunshots and this is real, there was panic. one of the doors wouldn't open so a lot of kids were panicking against a locked door, and went around to the other side. kept saying, everybody stay calm, we're okay. it was scary. >> how long was it when you got out that you saw police coming in right away and. >> from the time gunshots rang out we headed towards the