Someone I don't know at the gates of Victoria Park (Wick Rd) who said "Hello".
I like it. I also like to acknowledge other fixie skidders and road cyclists. You know, there's that kind of more* clued up* cyclists similar to mountain climbers - you are there on purpose, you enjoy it, it's not purely about getting from A to B. And it's worth to nod, wave, say something.
Amen brother!