A man joins a big corporate empire as a trainee.
On his very first day of work, he dials the pantry and shouts into the phone - "Get me a 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, dumbo?"

"No," replied the trainee.
" It's the CEO of the company, you fool!"

The trainee shouts back, "And do YOU know who YOU are talking to, you fool?!"
" No." replied the CEO indignantly.

"Good!" replied the trainee, and puts down the phone.