He went to the bathroom and entered the code. It blinked red — occupied.
Thinking it through, he thought the light had blinked red twice. He’d never seen that before, so he tried it again. It again blinked red twice.
That seemed odd. Beginning again, he suddenly laughed. He’d been entering his ATM PIN. With the correct digits entered, the door blinked green.
Michael Seidel, writer 
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