Stop me if you've heard this one:

The company president was standing in front of the office paper shredder, with a piece of paper in his hand, looking puzzled. A secretary was walking by, so he stopped her. "Say, do you know how to work this thing?" he asked.

Without a word, she took the paper out of his hand and fed it into the shredder. It began running automatically, and soon the paper had disappeared. Then the boss said, "That's great! Now, I want two copies."