It was late in the evening post-midnight buffet and we were happily chatting when the entire boat rocked, and I said (sadly presciently) "Huh. If we were in a plane I'd say we just did a 180º turn." Nothing much happened for a bit and then we started hearing an announcement in the hallways of "Would Mr. and Mrs. X please pick up the nearest courtesy phone." Ok, somebody has gone missing - it's the night of the Midnight Feast so they're probably in a food coma somewhere.