On his first day on the job, the trainee dialed the kitchen and shouted into the phone:
“Get me a cup of coffee, quickly!”
The voice from the other side responded: “You fool, you’ve dialed the wrong extension! Do you know who you’re talking to?”
“No,” replied the trainee.
“It’s the Managing Director of the company, idiot!”
The trainee shouted back: “And do you know who YOU are talking to, you idiot?”