I went to school with a guy who is very distinctive. Very large, red hair, usually very neatly cut, little goatee beard. I was once buying a sandwich at lunchtime and saw him in a phonebox (before the days of mobile phones) I wandered over smiled and waved and he made a dismissive gesture and turned his back. I followed him round the box and he turned away again. I then went into full-on idiot mode, running round the box, waving my arms, making faces, sticking out my tongue. He finished his phonecall, came out of the box - and it wasn't him!
He was so like him, I still sometimes wonder if it was him, pulling a trick on me, but the accent was all wrong.