It happened extremely fast (of course). Mr. Jamison saw the barrel of a machine gun point into the room and he lashed out with his left hand.

He felt the blade make contact and jumped in front of the terrorist stabbing at his face with the second blade. After a few seconds of furious stabbing Mr.Jamison opened his eyes. The floor was covered in blood, and the guard had crumpled to his feet. He gagged, but held himself together and reached into the mess of blood and flesh to retrieve his scissors and the gun.

Stepping over the body he checked his surroundings. What had he just done?
He had killed a man.