It was either a horror/psychological movie or show, but I think it was a movie. Probably around 2000s or 2010s even. I remember a character out in the street/sidewalk area seeing a man in a suit facing the wrong way. The man was always following the character but also always facing the opposite way. I can’t remember if the man was a ghost or hallucination. Sort of reminded me of the tall man that floats in the Haunting of Hill House show. I’m so stuck on this vague memory!