I saw the opposite a few weeks ago. After being stuck in a traffic jam for ages, we found the reason for the hold-up - a broken-down car in the right-hand lane at some traffic lights, with two very fit young men leaning on it chatting, waiting for the breakdown truck I suppose. It was only a puny little Fiat, on a dead flat road, so why they didn't just push it out of the way is anyone's guess.
and it wouldn't dawn on their tiny minds that their breakdown truck was also stuck in the queue.
The other day, while i was fighting an unplanned deflation, a bloke stopped in a car, looked at me and said "Sorry luv, thought you were someone i knew" and then drove off. cheers mate, your help was greatly appreciated.
I met my favourite cycling friend Clive, coz he stopped his car to help me with my first ever unplanned deflation. Bless, Been buddies ever since.
and just to tip the balance, thanks to the retired couple who did stop to help me when i fell off when i was 23. They left my bike at the local travel inn for safe keeping and they took me home in their nice jag with cream seats!!! bless. I was covered in mud and they didn't care.