sorry if this has been posted before but just saw it. Some guy goes into a school meeting with a gun and holds them hostage, no one dies apart from the gunman. The end footage of him shooting is terrifying, but really the gem in all of this is at the 44 second mark...

http://www.cnn.com/2010/CRIME/12/14/florida.meeting.shooting/index.html?hpt=T1

the shooting...

http://www.youtube.com/watch?feature=iv&v=6JNCLBEvko4&annotation_id=annotation_748946