Was at a small class where a few people were huddled around the prof. I walk in and notice this girl and looked at her, she looks at me then looks away then looks back again and we stared into each other's eyes for like 5 seconds before I looked away. A few days later I'm walking out of class as she walks in and she notices me and gives an intense surprised look (kinda like this https://www.canstockphoto.ca/woman-shock-surprise-0162196.html, it was a really heavy look), needless to say not very sexy so I was kinda weirded out and walked away. What was this lol?