Deposit with a Whisper

One day a young man went up to the teller window at the bank and whispered, "Please deposit this hundred dollars in my savings account."

The teller handled the transaction and whispered back, "Have a good day."

He started to leave but changed his mind.

"I'm sorry we have to whisper," he said, "but if my car knows I've deposited money, it'll break down again."

With his finger to his lips he tiptoed out.