This probably sounds silly.
I visited my bank today and a man came in and wanted to walk past me (I was in a narrow corridor).
Instead of saying "Excuse me", he put his fingers on either side of my waist and lightly pinched me. I sort of yelped and he walked past me.
I really wish I had politely told him that I didn't like this, but I chickened out.
I'm making a fuss about nothing, I know, but it has shaken me.