I am old. I had an old foot injury repaired last month. An overuse injury combined with iffy bone structure - bone spurs in my big toe joint. My first day back at work, after the general manager asked what happened to me, he said "better make up a good story, that makes you sound old."
So, which makes me sound younger yet still professional: "I jumped off the balcony, all the other kids were doing it", or "I don't remember, I just woke up in the emergency room and my foot hurt like hell".