Was the old guy me?

Yesterday I was walking to a toilet slightly further away than the closest toilet, mostly for a bit of a walk. I noticed an old guy, about 70, overweight with white hair, sitting on the seats opposite a lecture theatre. He looked to be waiting for something and a bit sleepy, but he was old of course.

Today I saw him again twice. What the fuck was he doing. It is not a great place to hang out. I started to fantasize that he was actually me from the future, because it didn't look as though anyone else could see him. Then I though even after 30 years, I may change a lot, but I don't think I will ever wear a grey sports jacket.

I almost went up to him to ask "why the fuck was he spying on me", but on the other hand it was none of my business.