Working at home improvement place one year, we had a co-worker named Haley who was a seasonal cashier up-front. She was mildly cute, but she was dumb as rocks, I'm not even lying. She would barely understand basic things and it would be up the point everyone would be either laughing about it or doing a face-palm. She went up to me one day and said "How do you make the paint?" She let me know she thought all the cans were empty and that the paint came straight out of the machine. In reality the majority of the paint is in the can and we just use a bit or a lot of tint to change it into the color the person wants. I explained that to her but still she didn't really understand. A few months later she quit and left for whatever else.
We stayed friends on social media for at least a year after that, but one day I realized she had unfriended me which is a big pet peeve of mine as I have "friends" that I don't even like very much, so for a person to do that shows they really don't like me, or at least that's what I perceive. Well... the other week I was at Sbarro at the mall and she was working there. She remembered who I was and it was pretty awkward, though I was polite but I have very little toleration for stuff like that so I was a little bitter. Not surprisingly, the guy working with her there showed his frustration when she kept screwing things up like burning pizza. My pizza that day was pretty low-par.