"Stop following me"

I had to tell a man on the train on my way to work today to "stop following me" because everywhere I went he was right by my side or treading on my heals. He was a bit close on the platform, and I virtually (unwillingly) gave him a piggy-back on to the train. It was chocker block, but still he managed to stand exactly where I was standing - even though I kept moving to try to get a bit more space.

He didn't say anything, luckily, he just looked away and moved down to the middle of the carriage.

Freak.