I was at the grocery store and a woman tapped my shoulder. I took off my noise canceling headphones and she said "Okay then, explain quantum to me."

I had no idea what she was talking about so I asked what she meant. She said "I watched a video on the standard model and didn't understand it at all."

I asked her why she was asking me and said said "Because you're wearing that shirt."

I was wearing this one:https://shirtoid.com/102906/periodic-table-of-scientists/

So I said "That's way too advanced for me." put my headphones back on and continued shopping.

The whole encounter was bizarre.