So last week, I accidentally bumped into some guy who was walking on the sidewalk, and he said "excuse me". Dark brown hair, green eyes and a tiny nose. He then walks off, but kept on staring at me.
The next few days I kept spotting this guy in crowds and just walking around the place. He acted weird, too. He would have a blank expression and just stare at people as they walk by, and he rubbed his hands on every object that he walked by.
Then, every time I looked at him he pretended to be doing something. (I.E. Looking at his phone, looking at his watch and whatnot) Then he just suddenly disappears. The last thing I saw him doing was adjusting his jacket.
Discuss this odd event.