A new customer called Tech Support to ask about  instructions from his computer's  user's manual. "It says, hit any key and when I do that nothing happens'.

The Tech Support  staff member replied, "Can you try again and tell me what happens?"

The customer  explained, "I tried but nothing happened".

The Tech Support worker then asked, "What key did you hit?"

After a moment and some  clinking sound the customer replied, "Well, first I tried my  car key and just now my office key."