In January 2011 a Canadian air pilot thought the planet Venus was another aircraft thus causing injury to fourteen passengers and two crew members.
The officer fell asleep for 75 minutes (instead of the 40-minute maximum allowed by airline regulations) and, upon waking, was told that a US cargo plane was flying towards his aircraft. The officer, still disorientated from his sleep, saw the planet Venus and mistook it for the other plane.
He immediately and abruptly changed direction and the aircraft experienced a sudden drop of at least 400 feet until the captain pulled it back up. Passengers, who weren’t wearing seatbelts despite the signs being lit, were injured as were two members of the crew. Seven of the passengers needed hospital treatment. The officer explained his deep sleep with the inability to sleep well at home because of his young children.
This shocking case proves that sleeping at work is inadvisable at best.