Anyway, it's a very nice image and I'm still convinced that luck is just a small part of it… 
Thanks, Francois.
One could consider patience, planning and the ability to wait a sort of skill though.
Basically its a well know street shooting tactic, to set up and wait.
Since I was standing there with the camera at my face, people simply started to ignore me and kept walking by.
I must admit I don't do it often enough, but I believe it's very effective.
Cheers
~Chris
