An instructor tells a story of a robbery trial. The officer goes to a convenience store to get a quick drink. Unfortunately this store is being robbed at the moment. The officer shoots the robber, but doesn't kill him. About a year later the robber is on trial. The officer takes the stand and is asked what he observed;
"I approached the store and observed the defendant there pointing a pistol at the head of the clerk. He was screaming 'give me the money!' I felt the clerk's life was in imminent danger as was mine if he turned his head to see me. So I drew my weapon and fired a shot at the suspect who dropped his weapon."
The robber takes the stand and is asked what happened;
"I was dealing with the clerk when this dude comes up behind me and says "surprise mother fu**** and shoots me!"