Calling the police 'sir'
Several times the caller brought the listeners into live by making them call him "sir", thus forcing them to acknowledge is position of power.
Would a US police officer ever expect a person to call them sir? In films I've heard people call officers 'sir', does this happen in real life.
I live in the UK, and nobody calls the police 'sir' and if the officer asked someone to call them 'sir' I think the public would rebel!