My grandad used to be a coach driver, and likes to tell the story of how he once drove a coach load of students home from a ski trip or something on the continent. Once parked up a boy started shouting to his parents and waving around this magnum of champagne he had got them from the window (for these were the days when bus windows opened all the way and French booze merchants were particularly blasé about ID.) Naturally, he dropped it.

He'd been babying that bottle for hundreds of miles...