It’s happened to us a few times, old friends or neighbours we hadn’t seen for years.
Outside a hotel in Nairobi, in Bahrain airport, outside Bond St tube in London.
Best for dh was many years ago, when he was away for work in Tanzania (IIRC) where for some reason his Visa card wasn’t accepted anywhere. I was frantically trying to arrange a transfer so he could pay his hotel bill, when on the steps of the hotel where he was staying, he virtually bumped into a Danish chap he’d worked with in the Middle East.
After the initial, ‘Fancy seeing you here, how are you?’ etc., dh said, ‘Got any money?
‘Yes, how much do you want?’ said Danish chap, opening a bag that was literally stuffed with cash. He’d come from up-country where he was working, to buy spare parts!
‘