Inspired by the lovely thread about kindest thing strangers have done for you, and also a chance for me to share this horror.
When I was 19, I worked on the tills at a supermarket in my holidays from university.
A woman I was serving was staring at me, trying to get my attention as I scanned her stuff. I looked up at her and smiled. She said, in still the most condescending tone I've ever heard:
'Don't you wish you'd studied now?'
I was so floored and ashamed, I didn't say a thing back and just carried on scanning her things. Fact was I was actually at university, but even if I hadn't been....aghh!....still gets me.
What are yours?