Was probably just a wonky eyelash or something in front of your eye. Your brain fills in the gaps “GenAI style,” so when one eye has something blurry in the way, the shape can briefly look like a person or figure.

Your brain trys to detect danger (danger<->the stuff you are afraid of) first, extra fast, if it moves.

I have dreads, and if one falls at the right angle, I’ve caught myself looking that way reflexively—even after realizing it was just my hair—like four times in a row.