Good Help is Hard to Find

A teacher was leaving the staff room when she found the Principal
standing in front of the paper shredder with a piece of paper in
his hand. "Listen," said the Principal, "this is important, and the
secretary has left for the day. Can you make this thing work?"

"Certainly," said the teacher. She turned the machine on, inserted the
paper, and pressed the start button.

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