Never ever assume that your boss knows what he's doing

A young engineer was leaving the office at 6.45 p.m. when he found the
Managing Director standing in front of a shredder with a piece of paper in
his hand.

"Listen," said the Managing Director, "this is a very sensitive and
important document, and my secretary is not here. Can you make this thing
work?"

"Certainly," said the young engineer. He turned the machine on, inserted the
paper, and pressed the start button.

"Excellent, excellent!" said the Managing Director as his paper disappeared
inside the machine, "I just need one copy."

Lesson:
Never ever assume that your boss knows what he's doing.