I remember once a very young and overly enthusic capt (American), asking me what type of passengers we were carrying. Flight was a charter MAN/MCO std 0600,operated by ATA. I told him they would be usual north of england,take it or leave it, pretty resourceful types,who were mostly still half asleap. He gave me a wry smile. We boarded all pax, they settled down into their seats, dispatcher just signing off last bit of paperwork and engineer doing the same. Then the pa blurted out in a real southern texan KFC type accent 'Good mornin ladies, gentleman and kiddies. Welcome onboard American Transair flight 123 from Manchester Uk to Nashville Tennesse USofA. Your non stop red eye special........................' Over 70% of the passengers shot up and got off the aircraft, thinking either they were on the wrong flight or that the Capt was a fruit cake.
It took quite some time for everyone to be convinced that it was ok to reboard and then finally when they did a very, very embarrassed Capt made a very,very apologetic pa. Just proves that passengers DO listen to those PA's !!!