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!
Maybe this short.
https://youtu.be/_u6Tt3PqIfQ
Or maybe this:
https://youtu.be/w2M3eLWwy2Y