It's funny when people think you're stalking them.
I remember saying hi to a girl on a bus once because I recognised her from my old maths class. She looked really alarmed, and I got slightly embarrassed by this, so I said something alongthe lines of "Oh don't you remember me, I was in your, erm, thingy class with, ummm, whatsisname".

She got off the bus as soon as she could, and I felt rather silly for a bit.
(mistafeesh bugrit! millenium hand and shrimp - I told 'em!, Tue 5 Feb 2008, 15:03, closed)

I too
went up to a girl I recognised from school ten years earlier. When I said hello she started to give me money thinking I was a begger. I wasn't that badly dressed..........
(Pork2311, Wed 6 Feb 2008, 9:42, closed)