Have you ever had a "What the..." moment socially?

I know this woman who works in a fish and chip takeaway near where I live and she's always, always hated me. Been rude to me, passive aggressive, unpleasant. Well today I went in this place and ordered a meal. She didn't serve me, someone else did. The order went wrong. So this woman got consulted and would ya believe it, she was nice to me, and she seemed to like me. When the bill came and I was £1 short she said it was fine and I could pay next time I was passing by. Anyone else had one of these weird out of the blue social experiences?