A few years after I graduated college, I ran into a high school teacher who would treat me like absolute garbage for no reason. I was always a decent student, I was never really a problem or anything.. But for some reason, this lady had it out for me from day one.
It was at a chain restaurant, something like an applebees or ruby tuesdays where I ran into her.
I was with my wife and kids just going out for a quick dinner during the week. She was my server. She definitely recognized me and neither of us said anything.
We ordered and ate our meals.. I left a nice tip and left.
After I saw her, I did some digging and found out she was fired from my school district and another one for being just a generally miserable wretch.