Look at this

A man joined a big Multi National Company as a trainee, On his first day, he dialled the kitchen and shouted into the phone:"

Trainee: Get me a cup of coffee, quickly!"

The voice from the other side responded:

Managing Director: "You fool; you've dialled the wrong extension! Do you know who you're talking to?"

Trainee: No.

Managing Director: It's the Managing Director of the company, you idiot!"

The trainee shouted back:

Trainee: "And do you know who YOU are talking to, you IDIOT?""

Managing Director: No (he repilied angrily)."

Trainee: Thank God! (and he quickly put the phone down),