"...uh...n...n...nice shoes!"
I had seen this gentleman cleaning the floor near the bathrooms at a school district where I was working as a substitute at their district office one day. He looked like he was working up the courage to say something as I entered, but I really had to go.
When I walked out, he was at the end of the hallway, and as I was passing him, he said "...uh...n...n...nice shoes!". I was wearing a pair of well-worn sneakers, the exact opposite of nice shoes. I just said, "...thanks...?" with a puzzled look on my face, turned the corner, and never saw him again.
Upon reflection, my best guess was that he was an individual with an intellectual disability and that his case worker (or therapist or family member or something) had been trying to help him overcome his shyness and become more social by giving someone a compliment, and that resulted in him mustering up the courage to tell me I had nice shoes.
In the moment, a VERY weird interaction. But he was being genuine, and I feel bad now about not showing him I appreciated his kind words.