With my Dad, years ago, buying a train ticket...
I must have been about 15 making my Dad 57, but he'd had grey hair and a white beard for a good 15 years at this point, so looked a lot older than that... (and of course as I was 15 I considered him practically ancient!)..
The older chap in front is having a lengthy and utterly irrelevant chat with the person in the ticket office. He is absolutely aware we are waiting!
This continues as the clock ticks (rather loudly) towards the time for my train, which does not permit you to buy a ticket ON the train and is the last one going where I need to go.
Eventually Dad says ' Excuse me, but could we buy our ticket please, it is rather urgent now...'
Older chap turns around, looks at my Dad:
'You'll wait your turn, Sunny Jim... I fought in the war for you!...' (Imagine Stans dad from Dinner Ladies!)
What the what now? I was gobsmacked, someone called my Dad Sunny Jim...
And then the ticket sales lady pipes up and it got SO much better...
'You didn't Mr Jones... the war ended when you were 12."
A rapid bit of maths, possible because she'd got his rail pass in front of her with his DoB on it!
I got my ticket, as Mr Jones and my Dad huffed and glared at each other, and I got on the train hoping that they wouldn't come to blows.