Corporal Conroy needed to use a pay phone, but didn't have
change for a dollar. He saw Private Duncan mopping the base's
corridor floors, and asked him,
"Soldier, do you have change for a dollar?"
Private Duncan replied, "Sure."
The Corporal turned red. He said, "That's no way to address a
superior officer! Now let's try it again. Private, do you have
change for a dollar?"
Private Duncan replied, "No, SIR!"