The Moron factor:

2 guys are standing out in a dark cold field with a couple hand held ground to air missiles. There is no radar or transponder equipement, just a radio. The airport is behind them so they know what commercial jets sound like. Fighter jets are 5 times louder and missiles sound hollow.
Their training was about loading, pointing weapon toward the enemy, hit the saftey switch and finally the trigger.
"DIDJA hear that? "hear what Akbar" "I see a flashing light" "You hear a flashing light?""Its a plane,its a missile" "well shoot what is it?"
WHOOSH What did you do? "you told me to shoot"
   -Typical moron factor-