I like this one . Saved By the Bell Although the phrase is associated with boxing, the origin is supposed to lie at the Horse Guard Parade in London. One night, during the Victorian era, a guard was famously accused of being asleep on duty. He denied the charge and claimed he had heard the main bell of Big Ben chime 13 times at midnight, instead of the usual 12. Such was the seriousness of the charge the clock mechanism was checked and it was discovered a cog was out of line and Big Ben would indeed chime 13 times instead of 12. On that evidence, the guard was freed - well and truly saved by the bell .