If you relate to that scenario, know that all the attention on you is probably in your head. Science has shown that our brains are hardwired to assume that people are staring at us, even if they're just kind of vaguely looking in our direction. Researchers at the University of Sydney did a study in which they had volunteers look at photographs of faces to determine which way they were looking. In cases where the answer wasn't obvious -- like, the image was blurry or they were wearing sunglasses -- the participants tended to assume by default that the face was staring directly at them.
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She's actually looking at the ghost behind you.
And that's not even the biggest dick move your paranoid brain pulls on you. It turns out that even when people are looking in your direction, your self-conscious mind misinterprets their expression. In another study, researchers showed the participants video clips of faces displaying either emotional or neutral expressions. When asked to describe how they thought the people in the images were feeling, people who rated highly for anxiety tended to report more emotion in neutral faces.
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"Ohmygod, he's gonna bite me on the face!"