While walking into the grocery store, I saw a girl I thought I recognized walking in at the same time, and I wanted to get a good look at her face, so I could tell where I knew her from. She started glancing back at me, repeatedly, which I thought was odd. I kept thinking "who is this girl, and why is she looking at me?", so I kept looking back, and we both were walking to the same part of the store, so I just kept walking. I was almost at the point of saying something to her, but didn't want to get into one of those awkward "where do we know each other from?" sorts of conversations, so I just said nothing and went to go check out. When I got there, I realized who she was, and why she kept looking at me after I looked at her questioningly the first time. She was Lindsey Stirling, and I think she thought I was following her.