An interesting sentence from Monk (2012):

Perhaps the two most dramatic examples of operators being asleep when they should have been awake are the airliner full of passengers that over-flew its U.S. West Coast airport and headed out over the Pacific with all of the flight crew asleep, and the Peach Bottom nuclear power plant in Pennsylvania, where regulators made an unexpected visit one night only to find everyone in the control room asleep (Lauber & Kayten, 1988).